A local DNS proxy which improves the performance of your computer
The first Open-Source high-performance MTA for high-volume senders
Fast and easy-to-use webmail front-end for your existing mail server.
Web and API based SMTP testing
Linux for for small offices and medium enterprises
Full SMTP/Mail server Appliance in 5 minutes
Send Mime and Smime Emails to Any Type of Mail Server
Mail Alert Simple Mailer
File system benchmark
Open Source Anti-Spam and Anti-Virus Gateway
To synch and encrypt all sorts of data across different sources
Send emails from command line
javascript to convert thunderbird/seamonkey filters to sieve rules
Webkosa is the open source edition of Webcrossing.
File scanning spam filter MDaemon plugin.