Take back control of your email with this mail server in a box
A fast, highly extensible, and event driven SMTP server
Mail hosting made simple
Small Business Appliance
command line tool to manage email (alias-)domains/accounts/aliases …
Mail system postfix dovecot openldap contact syncronization
Debian Mailserver
Linux Mail Server with Calendaring and IM
Pre-Installed Ubuntu Server configured for Webserver.