Anti-Spam SMTP Proxy Server implements multiple spam filters
A network security analysis and monitoring toolkit Linux distribution.
VICIdial Contact Center Suite
Universal server
Mailing List Manager - Web-based, Self-Hosted, Feature-Rich
Anti Spam SMTP Gateway
Pushes one guest file to multiple other hotline servers
Process messages held by Mailman for approval
Zentyal is a Linux Small Business Server
Full SMTP/Mail server Appliance in 5 minutes
Command line utility for administering Sympa mailing lists.
Accent interfaces and controls systems through goals and policies
IPsec / IKEv2-based VPN software for Linux.
WebDAV CGI brings your file service to the Web.
Open Source Anti-Spam and Anti-Virus Gateway
Various TCP/IP servers, clients and network management tools
MailSmsGateway is a simple interface between mailing and sms services.
File sharing script
AV/content filter for Qmail