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<!DOCTYPE html>
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<title>Preface — Cyrus IMAP 3.10.0 documentation</title>
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<h1>Cyrus IMAP</h1>
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<p class="caption"><span class="caption-text">Cyrus IMAP</span></p>
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<li class="toctree-l1"><a class="reference internal" href="download.html">Download</a><ul>
<li class="toctree-l2"><a class="reference internal" href="imap/download/getcyrus.html">Get Cyrus</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/download/getcyrus.html#distribution-package">Distribution Package</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/download/installation/distributions/centos.html">CentOS</a></li>
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<li class="toctree-l3"><a class="reference internal" href="imap/download/getcyrus.html#build-and-install-yourself">Build and Install Yourself</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/download/getcyrus.html#use-a-release-packaged-tarball">Use a release packaged tarball</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/getcyrus.html#use-the-source-from-git">Use the source from Git</a></li>
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<li class="toctree-l3"><a class="reference internal" href="imap/download/getcyrus.html#licensing">Licensing</a></li>
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<li class="toctree-l2"><a class="reference internal" href="imap/download/release-notes/index.html">Release Notes</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="imap/download/release-notes/index.html#supported-product-series">Supported Product Series</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-3-10">Series 3.10</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-3-8">Series 3.8</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-3-6">Series 3.6</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-3-4">Series 3.4</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-3-2">Series 3.2</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-3-0">Series 3.0</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-2-5">Series 2.5</a></li>
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<li class="toctree-l3"><a class="reference internal" href="imap/download/release-notes/index.html#development-snapshots">Development snapshots</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/3.7/index.html">Cyrus IMAP 3.7 Tags</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/3.5/index.html">Cyrus IMAP 3.5 Tags</a></li>
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<li class="toctree-l3"><a class="reference internal" href="imap/download/release-notes/index.html#older-versions">Older Versions</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-1">Series 1</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/release-notes/index.html#series-2-2-0-2-4">Series 2: 2.0 - 2.4</a></li>
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<li class="toctree-l2"><a class="reference internal" href="imap/download/packagers.html">Notes for Packagers</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/download/packagers.html#binary-naming">Binary naming</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/packagers.html#sample-configuration-files">Sample configuration files</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/packagers.html#predefined-configurations">Predefined configurations</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/download/packagers.html#the-configuration-file-for-master-cyrus-conf">The configuration file for master: cyrus.conf</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/packagers.html#the-configuration-file-for-the-various-programs-imapd-conf">The configuration file for the various programs: imapd.conf</a></li>
</ul>
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<li class="toctree-l3"><a class="reference internal" href="imap/download/packagers.html#services-in-etc-services">Services in <code class="docutils literal notranslate"><span class="pre">/etc/services</span></code></a></li>
</ul>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="quickstart.html">Quickstart Guide</a><ul>
<li class="toctree-l2"><a class="reference internal" href="imap/quickstart/introduction.html">Introduction to Cyrus IMAP</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/quickstart/introduction.html#what-is-imap">What is IMAP?</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="quickstart.html#quick-install">Quick install</a><ul>
<li class="toctree-l3"><a class="reference internal" href="quickstart.html#install-cyrus-package-s">1. Install Cyrus package(s)</a></li>
<li class="toctree-l3"><a class="reference internal" href="quickstart.html#setup-the-cyrus-mail-user-and-group">2. Setup the cyrus:mail user and group</a></li>
<li class="toctree-l3"><a class="reference internal" href="quickstart.html#setting-up-authentication-with-sasl">3. Setting up authentication with SASL</a></li>
<li class="toctree-l3"><a class="reference internal" href="quickstart.html#setup-mail-delivery-from-your-mta">4. Setup mail delivery from your MTA</a></li>
<li class="toctree-l3"><a class="reference internal" href="quickstart.html#protocol-ports">5. Protocol ports</a></li>
<li class="toctree-l3"><a class="reference internal" href="quickstart.html#configuring-cyrus">6. Configuring Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="quickstart.html#launch-cyrus">7. Launch Cyrus</a></li>
</ul>
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<li class="toctree-l1"><a class="reference internal" href="overview.html">Overview</a><ul>
<li class="toctree-l2"><a class="reference internal" href="imap/concepts/features.html">Features</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/features.html#security-and-authentication">Security and Authentication</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/authentication-kerberos.html">Kerberos Authentication</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/authentication-ldap.html">LDAP Authentication</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/authentication-sql.html">SQL Authentication</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/access-control.html">Access Control</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/sealed-system.html">Sealed System Design</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/features.html#mailbox-management">Mailbox Management</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/automatic-creation-of-mailboxes.html">Automatic Creation of Mailboxes</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/namespaces.html">Mailbox Namespaces</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/virtual-domains.html">Virtual Domains</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/mailbox-annotations.html">Mailbox Annotations (METADATA)</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/mailbox-distribution.html">Mailbox Distribution</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/features.html#message-management">Message Management</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/delayed-delete.html">Delayed Delete</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/delayed-expunge.html">Delayed Expunge</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/message-annotations.html">Message Annotations (METADATA)</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/duplicate-message-delivery-suppression.html">Duplicate Message Delivery Suppression</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/shared-seen-state.html">Shared Seen State</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/server-side-filtering.html">Server Side Filtering (Sieve)</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/event-notifications.html">Event Notifications</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/features.html#calendar-and-contact-dav-collection-management">Calendar and Contact (DAV) Collection Management</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/caldav-collections.html">CalDAV Collections</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/dav-components.html">DAV Components</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/dav-collection-mgmt.html">DAV Collection Management</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/carddav.html">CardDAV Support</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/features.html#storage">Storage</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/mail-spool-partitions.html">Mail Spool Partitions</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/mailbox-metadata-partitions.html">Mailbox Metadata Partitions</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/archiving.html">Archiving</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/quota.html">Quota</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/single-instance-store.html">Single-Instance Store</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/features.html#load-management">Load Management</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/features/server-aggregation.html">Cyrus IMAP Murder (Server Aggregation)</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="imap/concepts/overview_and_concepts.html">Concepts</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#access-control-lists">Access Control Lists</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#working-with-acls">Working with ACLs</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#sample-acl">Sample ACL</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#access-rights">Access Rights</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#access-control-defaults">Access Control Defaults</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#access-control-identifier-aci">Access Control Identifier (ACI)</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#negative-rights">Negative Rights</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#calculating-a-users-rights">Calculating a Users' Rights</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#login-authentication">Login Authentication</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#anonymous-login">Anonymous Login</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#plaintext-authentication">Plaintext Authentication</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#kerberos-logins">Kerberos Logins</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#shared-secrets-logins">Shared Secrets Logins</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#quotas">Quotas</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#working-with-quotas">Working with Quotas</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#monitor-and-repair">Monitor and Repair</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#supported-quota-types">Supported Quota Types</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#quota-roots">Quota Roots</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#controlling-quota-behavior">Controlling Quota Behavior</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#mail-delivery-behavior">Mail Delivery Behavior</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#quota-warnings-upon-select-when-user-has-d-rights">Quota Warnings Upon Select When User Has <code class="docutils literal notranslate"><span class="pre">d</span></code> Rights</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#quotas-and-partitions">Quotas and Partitions</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#new-mail-notification">New Mail Notification</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#partitions">Partitions</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#specifying-partitions-with-create">Specifying Partitions with "create"</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#changing-partitions-with-rename">Changing Partitions with "rename"</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#news">News</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#pop3-server">POP3 Server</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#the-syslog-facility">The syslog facility</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#mail-directory-recovery">Mail Directory Recovery</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#reconstructing-mailbox-directories">Reconstructing Mailbox Directories</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#reconstructing-the-mailboxes-file">Reconstructing the Mailboxes File</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#reconstructing-quota-roots">Reconstructing Quota Roots</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#removing-quota-roots">Removing Quota Roots</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#subscriptions">Subscriptions</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#configuration-directory">Configuration Directory</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#log-directory">Log Directory</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#proc-directory">Proc Directory</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#message-delivery">Message Delivery</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#local-mail-transfer-protocol-lmtp">Local Mail Transfer Protocol (lmtp)</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#single-instance-store">Single Instance Store</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#duplicate-delivery-suppression">Duplicate Delivery Suppression</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#sieve-a-mail-filtering-language">Sieve, a Mail Filtering Language</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/overview_and_concepts.html#cyrus-murder-the-imap-aggregator">Cyrus Murder, the IMAP Aggregator</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="setup.html">Setup</a><ul>
<li class="toctree-l2"><a class="reference internal" href="imap/developer/compiling.html">Compiling</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/compiling.html#setting-up-dependencies">Setting up dependencies</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/compiling.html#required-build-dependencies">Required Build Dependencies</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/compiling.html#build-dependencies-for-additional-functionality">Build dependencies for additional functionality</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/compiling.html#compile-cyrus">Compile Cyrus</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/compiling.html#default-build-mail-only">Default build: mail only</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/compiling.html#optional-dependencies">Optional dependencies</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/compiling.html#compile">Compile</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/compiling.html#check">Check</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="imap/installing.html">Installing Cyrus</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/installing.html#install-cyrus">Install Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/installing.html#optional-components">Optional Components</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/download/installation/manage-dav.html">HTTP modules</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/installation/virus.html">Virus Scanner</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/installing.html#setting-up-syslog">Setting up syslog</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/installing.html#create-cyrus-environment">Create Cyrus environment</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/installing.html#set-up-the-cyrus-mail-user-and-group">Set up the cyrus:mail user and group</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/installing.html#authentication-with-sasl">Authentication with SASL</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/installing.html#mail-delivery-from-your-mta">Mail delivery from your MTA</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/installing.html#protocol-ports">Protocol ports</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/installing.html#cyrus-config-files">Cyrus config files</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/installing.html#optional-setting-up-tls-certificates">Optional: Setting up TLS certificates</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/installing.html#prepare-ephemeral-run-time-storage-directories">Prepare ephemeral (run-time) storage directories</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/installing.html#launch-cyrus">Launch Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/installing.html#send-a-test-email">Send a test email</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/installing.html#checking-carddav-and-caldav">Checking CardDAV and CalDAV</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/installing.html#troubleshooting">Troubleshooting</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="imap/download/upgrade.html">Upgrading to 3.10</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#preparation">1. Preparation</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#versions-to-upgrade-from">Versions to upgrade from</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#installation-from-tarball">Installation from tarball</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#storage-changes">Storage changes</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#jmap-caldav-changes">JMAP/CalDAV changes</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#sieve-changes">Sieve changes</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#master-pid-and-master-ready-files">master.pid and master.ready files</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#pcre2-support">PCRE2 support</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#cyrus-backups-feature-is-deprecated-as-of-3-10">Cyrus Backups feature is deprecated as of 3.10</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#how-are-you-planning-on-upgrading">How are you planning on upgrading?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/download/upgrade.html#do-what-as-who">Do What As Who?</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#install-new-3-10-cyrus">2. Install new 3.10 Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#shut-down-existing-cyrus">3. Shut down existing Cyrus</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#backup-and-copy-existing-data">4. Backup and Copy existing data</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#copy-config-files-and-update">5. Copy config files and update</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#upgrade-specific-items">6. Upgrade specific items</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#start-new-3-10-cyrus-and-verify">7. Start new 3.10 Cyrus and verify</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#reconstruct-databases-and-cache">8. Reconstruct databases and cache</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#do-you-want-any-new-features">9. Do you want any new features?</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#upgrade-complete">10. Upgrade complete</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/download/upgrade.html#special-note-for-murder-configurations">Special note for Murder configurations</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="imap/concepts/deployment.html">Configuration Guide</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html">Deployment Scenarios</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html#single-server-deployments">Single Server Deployments</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html#multi-server-deployments">Multi Server Deployments</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html#cyrus-murder-server-aggregation">Cyrus Murder: Server aggregation</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html#the-discrete-murder">The Discrete Murder</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html#the-unified-murder">The Unified Murder</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html#the-shared-murder">The Shared Murder</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html#cyrus-replication">Cyrus Replication</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/deployment_scenarios.html#hosted-environments">Hosted Environments</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/databases.html">Databases</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/databases.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/databases.html#file-list">File list</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/databases.html#storage-types">Storage types</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/mailbox_creation_distribution.html">Mailbox Creation Distribution</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/mailbox_creation_distribution.html#selection-mode">Selection Mode</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/mailbox_creation_distribution.html#special-cases">Special cases</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/mailbox_creation_distribution.html#partitions-exclusion">Partitions Exclusion</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/mailbox_creation_distribution.html#partitions-usage-data-reset">Partitions Usage Data Reset</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/mailbox_creation_distribution.html#mailbox-creation-distribution-through-murder-frontend">Mailbox Creation Distribution Through <code class="docutils literal notranslate"><span class="pre">murder</span> <span class="pre">frontend</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/mailbox_creation_distribution.html#backends-exclusion">Backends Exclusion</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/mailbox_creation_distribution.html#backends-usage-data-reset">Backends Usage Data Reset</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/known_protocol_limitations.html">Known Protocol Limitations</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/known_protocol_limitations.html#pop3-and-mailbox-locking">POP3 and Mailbox Locking</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/known_protocol_limitations.html#cyrus-imap-pop3-implementation">Cyrus IMAP POP3 Implementation</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/authentication_and_authorization.html">Authentication and Authorization</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/authentication_and_authorization.html#client-authentication">Client Authentication</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/authentication_and_authorization.html#users-and-mailboxes">Users and Mailboxes</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/performance_recommendations.html">Performance Recommendations</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/performance_recommendations.html#databases-on-temporary-filesystems">Databases on Temporary Filesystems</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/performance_recommendations.html#certificates">Certificates</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/storage.html">Storage Considerations</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/storage.html#general-notes-on-storage">General Notes on Storage</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/storage.html#redundancy">Redundancy</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/storage.html#availability">Availability</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/storage.html#performance">Performance</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/storage.html#scalability">Scalability</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/storage.html#capacity">Capacity</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/storage.html#cost">Cost</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/concepts/deployment/supported-platforms.html">Supported Platforms and System Requirements</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/supported-platforms.html#building-cyrus-imap">Building Cyrus IMAP</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/supported-platforms.html#required-software-components">Required Software Components</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/supported-platforms.html#recommended-software-components">Recommended Software Components</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/concepts/deployment/supported-platforms.html#recommended-software-components-enabled-by-default">Recommended Software Components Enabled by Default</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="operations.html">Operations</a><ul>
<li class="toctree-l2"><a class="reference internal" href="imap/reference/manpages/index.html">Man pages</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/manpages/index.html#configuration-files">(5) Configuration Files</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/configs/cyrus.conf.html"><strong>cyrus.conf</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/configs/imapd.conf.html"><strong>imapd.conf</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/configs/krb.equiv.html"><strong>krb.equiv</strong></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/manpages/index.html#system-commands">(8) System Commands</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/arbitron.html"><strong>arbitron</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/backupd.html"><strong>backupd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/chk_cyrus.html"><strong>chk_cyrus</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ctl_backups.html"><strong>ctl_backups</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ctl_conversationsdb.html"><strong>ctl_conversationsdb</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ctl_cyrusdb.html"><strong>ctl_cyrusdb</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ctl_deliver.html"><strong>ctl_deliver</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ctl_mboxlist.html"><strong>ctl_mboxlist</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ctl_zoneinfo.html"><strong>ctl_zoneinfo</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cvt_cyrusdb.html"><strong>cvt_cyrusdb</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cvt_xlist_specialuse.html"><strong>cvt_xlist_specialuse</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_backup.html"><strong>cyr_backup</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_buildinfo.html"><strong>cyr_buildinfo</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_dbtool.html"><strong>cyr_dbtool</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_deny.html"><strong>cyr_deny</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_df.html"><strong>cyr_df</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_expire.html"><strong>cyr_expire</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_info.html"><strong>cyr_info</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_ls.html"><strong>cyr_ls</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_synclog.html"><strong>cyr_synclog</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_userseen.html"><strong>cyr_userseen</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyr_virusscan.html"><strong>cyr_virusscan</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyradm.html"><strong>cyradm</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/cyrdump.html"><strong>cyrdump</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/deliver.html"><strong>deliver</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/fetchnews.html"><strong>fetchnews</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/fud.html"><strong>fud</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/httpd.html"><strong>httpd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/idled.html"><strong>idled</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/imapd.html"><strong>imapd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ipurge.html"><strong>ipurge</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/lmtpd.html"><strong>lmtpd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/lmtpproxyd.html"><strong>lmtpproxyd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/masssievec.html"><strong>masssievec</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/master.html"><strong>master</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/mbexamine.html"><strong>mbexamine</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/mbpath.html"><strong>mbpath</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/mbtool.html"><strong>mbtool</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/mkimap.html"><strong>mkimap</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/mknewsgroups.html"><strong>mknewsgroups</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/mupdate.html"><strong>mupdate</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/nntpd.html"><strong>nntpd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/notifyd.html"><strong>notifyd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/pop3d.html"><strong>pop3d</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/pop3proxyd.html"><strong>pop3proxyd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/promstatsd.html"><strong>promstatsd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/proxyd.html"><strong>proxyd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ptdump.html"><strong>ptdump</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ptexpire.html"><strong>ptexpire</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/ptloader.html"><strong>ptloader</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/quota.html"><strong>quota</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/reconstruct.html"><strong>reconstruct</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/rehash.html"><strong>rehash</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/relocate_by_id.html"><strong>relocate_by_id</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/restore.html"><strong>restore</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/sievec.html"><strong>sievec</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/sieved.html"><strong>sieved</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/smmapd.html"><strong>smmapd</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/squatter.html"><strong>squatter</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/sync_client.html"><strong>sync_client</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/sync_reset.html"><strong>sync_reset</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/sync_server.html"><strong>sync_server</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/timsieved.html"><strong>timsieved</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/tls_prune.html"><strong>tls_prune</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/translatesieve.html"><strong>translatesieve</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/systemcommands/unexpunge.html"><strong>unexpunge</strong></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/manpages/index.html#user-commands">(1) User Commands</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/arbitronsort.pl.html"><strong>arbitronsort.pl</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/dav_reconstruct.html"><strong>dav_reconstruct</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/httptest.html"><strong>httptest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/imtest.html"><strong>imtest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/installsieve.html"><strong>installsieve</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/lmtptest.html"><strong>lmtptest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/mupdatetest.html"><strong>mupdatetest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/nntptest.html"><strong>nntptest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/pop3test.html"><strong>pop3test</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/sieveshell.html"><strong>sieveshell</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/sivtest.html"><strong>sivtest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/smtptest.html"><strong>smtptest</strong></a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/manpages/usercommands/synctest.html"><strong>synctest</strong></a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="imap/reference/admin.html">Administrator Guide</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/admin.html#architecture">Architecture</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/architecture.html">System Architecture</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/admin.html#management">Management</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/locations.html">File & Directory Locations</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/ports-sockets.html">Ports and Sockets</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/access-control.html">Access Control</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/quotas.html">Quotas</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/sieve.html">Cyrus Sieve</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/backups.html">Cyrus Backups</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/nntp.html">Cyrus NNTP</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/protlayer.html">Cyrus Prot Layer</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/sop.html">Standard Operating Procedures</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/eventsource.html">Cyrus Event Source</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/monitoring.html">Monitoring</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/config-mailboxdistribution.html">Mailbox Distribution</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/murder/murder.html">Cyrus Murder</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/nginx-proxy.html">HOWTO: Using an NGINX IMAP Proxy</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/admin/tweaking.html">Tweaking Cyrus IMAP</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="imap/reference/faq.html">Frequently Asked Questions</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/faq.html#features">Features</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/feature-database-backend.html">Which database backend should I use for which databases?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/feature-duplicate-delivery.html">Duplicate Delivery Suppression</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/faq.html#installation-problems">Installation Problems</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/install-compilationerrors.html">Compilation errors about kssl.h and krb5.h on Red Hat Linux/Fedora</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/install-install-help.html">Help! There must be an easier way to get all this going...</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/install-linkerwarnings.html">OpenSSL Version Mismatches</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/faq.html#common-feature-requests">Common Feature Requests</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/r-murder-ha.html">Does the Cyrus Murder support High Availability configurations?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/r-pop3-logging.html">Can I configure pop3d to log amount and size of messages fetched by user?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/r-publicssharedfolders.html">How can I make CyrusSieve work with public shared folders?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/r-subfolders.html">Can I have subfolders not appear under INBOX?</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/faq.html#common-operational-questions">Common Operational Questions</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-acls.html">How do I view ACLs on a mailbox?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-annotations.html">What annotations are available?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-configdir-tempfs.html">Is it safe to put <configdirectory>/proc and <configdirectory>/lock on a tmpfs filesystem?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-coredump.html">How to enable core dumps</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-delete-mailbox.html">Why can I not delete a mailbox as an admin user?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-deleted-expired-expunged-purged.html">When is What ... Deleted, Expired, Expunged or Purged?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-deliverdb-size.html">Why is deliver.db so large?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-freezes.html">I have multiple imapd-SERVICES configured and experience occasional freezes when I try to log in!</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-gdb.html">How to run gdb on Cyrus components</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-mailbox-doesnotexist.html">Cyrus delivers claims that the mailbox does not exist</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-mixedcase.html">Why is mail being rejected with No Mailbox found due to MiXed CaSe incoming e-mail?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-otherdatabases.html">Can I use MySQL (or another SQL database) as the primary mail store?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-pop3slow.html">Why do POP3 connections take so long, but once the connection is established all is well?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-reconstruct.html">Why does reconstruct -m not work?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-sharedfilesystem-gpfs.html">Shared File Systems GPFS for high availability</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-telemetry.html">How to enable telemetry</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-toomanyprocesses.html">The process count keeps growing!</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-unable-join-environment.html">"unable to join environment" error</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/o-vacation-mailfrom.html">Why does Cyrus set the MAIL FROM address of the sender of vacation responses to '<>'?</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/reference/faq.html#common-interoperability-problems">Common Interoperability Problems</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/interop-8bit.html">Why does Cyrus reject 8-bit characters in the headers of my messages?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/interop-barenewlines.html">Why does Cyrus reject messages with "bare newlines"?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/interop-sieve-exim.html">How do I get Cyrus Sieve to play nice with Exim?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/reference/faqs/interop-slow-delivery.html">Why does mail delivery go slow or hang sometimes?</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="developers.html">Developers</a><ul>
<li class="toctree-l2"><a class="reference internal" href="contribute.html">We need your help</a></li>
<li class="toctree-l2"><a class="reference internal" href="imap/developer/documentation.html">Contribute docs</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/documentation.html#overview">Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/documentation.html#documentation-tools">Documentation Tools</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/documentation.html#building-the-files">Building the files</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/documentation.html#submitting-updates">Submitting updates</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/documentation.html#using-github-pull-requests">Using GitHub pull requests</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/documentation.html#patches-through-the-mailing-list">Patches through the mailing list</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/documentation.html#special-tags">Special Tags</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/documentation.html#rfc">rfc</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/documentation.html#cyrusman">cyrusman</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/documentation.html#imap-current-stable-version">imap_current_stable_version</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/documentation.html#conventions-man-pages">Conventions: Man Pages</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/documentation.html#synopsis">Synopsis</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/documentation.html#examples">Examples</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="imap/developer.html">Contribute code and tests</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/developer.html#getting-started">Getting Started</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/process.html">Development Process</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/overview.html">Overview of Cyrus development environment</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/github-guide.html">GitHub guide</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/compiling.html">Compiling</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/installing.html">Installing Cyrus</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/developer-testing.html">Developer Test Environment</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/coverage.html">Test Coverage</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/jmap.html">JMAP support</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer.html#system-files-and-databases">System files and Databases</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/namespaces.html">Namespaces: a developer view</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer.html#resources">Resources</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/libraries.html">Developer Libraries</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer.html#releasing">Releasing</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/releasing.html">Releasing Cyrus IMAP - normal releases</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/major-releasing.html">Releasing Cyrus IMAP - major releases</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/snapshot-releasing.html">Releasing Cyrus IMAP - developer snapshots</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/ancient-releasing.html">Releasing new builds of ancient Cyrus IMAP versions</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="imap/developer/cyrusworks.html">Cyrus.Works</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/cyrusworks.html#about-cyrus-works">About Cyrus Works</a></li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/cyrusworks.html#how-it-works">How it works</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="developers.html#cyrus-internals">Cyrus Internals</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/API.html">Cyrus APIs</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/API/cyrusdb.html">CyrusDB API</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/API/cyrusdb2.html">cyrusdb API</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/API/index-api.html">Index API</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/API/mailbox-api.html">Mailbox API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/thoughts.html">Thoughts & Notes</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/thoughts/backup.html">Notes for backup implementation</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/thoughts/bytecode.html">Cyrus IMAP Server: Sieve Bytecode</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/thoughts/caldav_scheduling_flowchart.html">Cyrus CalDAV Scheduling Flowchart</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/thoughts/improved_mboxlist_sort.html">Enabling improved_mboxlist_sort</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/thoughts/notes.html">Cyrus IMAP Server: Notes</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/thoughts/prot-events.html">Cyrus IMAP Server: Prot Events</a></li>
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<li class="toctree-l3"><a class="reference internal" href="imap/developer/guidance.html">Guidance for Developers</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/hacking.html">Cyrus IMAP Server: Hacking</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/internationalization.html">Cyrus IMAP Server: Internationalization</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/locking.html">Cyrus IMAP Server: Locking</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/mailbox-format.html">Cyrus IMAP Server: Mailbox File Formats</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/namelocks.html">Cyrus IMAP Server: Namelocks</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/prot.html">Cyrus IMAP Server: prot layer</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/replication_examples.html">Cyrus IMAP Server: Replication Examples</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/replication_protocol.html">Cyrus IMAP Server: Replication Protocol v2.4+</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/special_chars.html">Cyrus IMAP Server: Special Characters</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/guidance/var_directory_structure.html">Cyrus IMAP Server: var directory structure</a></li>
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<li class="toctree-l2"><a class="reference internal" href="developers.html#unit-tests">Unit Tests</a><ul>
<li class="toctree-l3"><a class="reference internal" href="imap/developer/unit-tests.html">Unit Tests</a><ul>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#table-of-contents">Table of Contents</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#introduction">1. Introduction</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#what-is-a-unit-test">2. What Is A Unit Test?</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#running-the-tests">3. Running The Tests</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#debugging-a-test">3.6 Debugging A Test</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#adding-your-own-tests">4. Adding Your Own Tests</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#where-to-put-your-tests">4.1 Where To Put Your Tests</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#adding-a-new-suite">4.1 Adding A New Suite</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#adding-a-test-to-a-suite">4.2 Adding A Test To A Suite</a></li>
<li class="toctree-l4"><a class="reference internal" href="imap/developer/unit-tests.html#suite-setup-and-teardown">4.3 Suite Setup And Teardown</a></li>
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<li class="toctree-l2"><a class="reference internal" href="overview/about_cyrus.html">About</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/what_is_cyrus.html">What is Cyrus</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/what_is_cyrus.html#what-is-cyrus">What is Cyrus</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/what_is_cyrus.html#what-is-imap">What is IMAP?</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/what_is_cyrus.html#imap-version-4-imap4">IMAP Version 4 (IMAP4)</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/what_is_cyrus.html#mime">Mime</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/what_is_cyrus.html#smtp">SMTP</a></li>
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<li class="toctree-l3"><a class="reference internal" href="overview/who_is_cyrus.html">Who Is Cyrus</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/who_is_cyrus.html#core-contributors">Core Contributors</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/who_is_cyrus.html#individual-contributors-and-past-contributors">Individual contributors and past contributors</a></li>
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<li class="toctree-l3"><a class="reference internal" href="overview/cyrus_roadmap.html">Cyrus Roadmap</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/cyrus_roadmap.html#high-level-roadmap">High Level Roadmap</a></li>
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<li class="toctree-l3"><a class="reference internal" href="overview/cyrus_history.html">Cyrus History</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/cyrus_bylaws.html">Cyrus Bylaws</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/cyrus_bylaws.html#i-the-cyrus-governance-board">I. The Cyrus Governance Board</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/cyrus_bylaws.html#ii-the-cyrus-core-developers-group">II. The Cyrus Core Developers Group</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/cyrus_bylaws.html#iii-the-release-engineer">III. The Release Engineer</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/cyrus_bylaws.html#iv-the-cyrus-roadmap">IV. The Cyrus Roadmap</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/cyrus_bylaws.html#v-development-process">V. Development Process</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/cyrus_bylaws.html#vi-changes-to-the-bylaws">VI. Changes to the Bylaws</a></li>
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<p class="caption"><span class="caption-text">Cyrus SASL</span></p>
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<li class="toctree-l1"><a class="reference external" href="http://www.cyrusimap.org/sasl">Cyrus SASL</a></li>
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<h1>Preface<a class="headerlink" href="#preface" title="Permalink to this headline">¶</a></h1>
<div class="section" id="about-cyrus">
<h2>About Cyrus<a class="headerlink" href="#about-cyrus" title="Permalink to this headline">¶</a></h2>
<p>Prior to 1994, <em>Carnegie Mellon University</em> (CMU) exclusively used the locally-developed and non-standard <em>Andrew Messaging System</em> (AMS) to service its email communication needs. When, in 1994, CMU wanted to move to a better scalable, standards-compliant mail system that met or exceeded the feature set of AMS, it started the Cyrus project.</p>
<p>Cyrus IMAP is named after Cyrus The Great (559 - 530 B.C.) who founded the Persian kingdom. Cyrus the Great also founded the world's first modern postal system whose motto was: "stopped by neither snow, rain, heat or gloom of night". The Pony Express was based on the Persian system and later the United States Postal Service adopted the slightly modified version of the Persian motto as their own.</p>
<p>At the time of this writing, Cyrus IMAP and Cyrus SASL are amongst the most widely used Free Software products. The largest mail environment reported to run on Cyrus IMAP services over 2.3 million users. A large group of project supporters sustain the continued development of the Cyrus software.</p>
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