Bill's Linux Qmail Toaster

Qmail SMTP Mail Server with SMTP-AUTH (Plain, Login, CRAM-MD5), TLS (SSL) support, and optional Virus/Spam Scanner.
POP3 Server with CRAM-MD5, APOP, and SSL support
IMAP Server with TLS (SSL) support
WebMail Server
Quota Support (usage viewable by webmail)
Autoresponder
Mailing Lists
Web-Based Email Administration