SMTP

No IMAP client. No forwarding capabilities. And worst of all, a useless SPAM detection algorithm.

If, like me, you are still using an old style LAMP stack combining Web and E-Mail, then you certainly made a “stay over” in SPAM-paradise. The Stack I self-host my E-Mails, using QMail and vpopmail with a bunch of intermediate tools like Spamassassin, Clamav, Greylisting, DNSBL checks. This helps to clean out incoming SPAM. Messages are delivered to users through courier-imap or qmail-pop3d. For outgoing messages, Qmail sends (via qmail-remote) the messages via SMTP to the concerned MX servers. Qmail doesn’t have a great way to handle SMTP-Auth, at least not without applying a bunch of patches. To allow users using the server to send E-Mails, I use Anubis on the submission port. Anubis takes the incoming messages and feeds it to qmail-queue for final delivery.