Client daemon to move mail from POP and IMAP to your local computer
SOGo Zero-Effort-Groupware
Anti Spam SMTP Gateway
software for email automation (newsletters, transaction mails, etc.)
one server framework
A Scalable Spam Filtering Architecture
cab
OpenSource high performance mail policy daemon for Postfi
an open source email archiving application
Reports IP addresses via Email or MySQL
Sends external IP changes via email, using Imap.