Anti-Spam SMTP Proxy Server implements multiple spam filters
Take back control of your email with this mail server in a box
Rapid spam filtering system
Simplistic interactive filtering tool
A fast, highly extensible, and event driven SMTP server
Mail Notifer for Windows
Per user/admin filtering of individual/group emails
WordPress plugin to block or allow user registrations
Blazor Table component with sorting, paging and filtering
A beautiful SMS messenger for Android
Python API for Sendmail Milters.
An easy-to-use anti-spam email gateway
A Scalable Spam Filtering Architecture
Open Source Anti-Spam and Anti-Virus Gateway
ICAP Daemon that implements content scanning
Advertising domain filtering list
commandline multiclass email and text filter
Rapid spam filtering system