MailClient, Service?

[pas]

Review:

I wouldn’t consider the mail client a model. In your model, there is no such thing as a mail client. This is a traditional service and I wouldn’t put it into the Model package. The separation between the client and the helper is also very confusing. A constructor should not be called “setup”. Then every mail has the same subject, which welcomes the user. This should definitely not be hardcoded in the “helper”. I would redesign that quite heavily.