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Anti-Spam SMTP Proxy Server implements multiple spam filters
The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods. Click 'Files' to download the professional version 2.8.1 build 24261.
A linux(ubuntu 20.04 LTS) and a freeBSD 12.2 based ready to run OVA of ASSP V2 are...
A module for Xataface to add mailing list capability to applications. Email can be sent to any found set, and any table can be treated as a mailing list, as long as each record contains an email address.
"distribution" is a message and data processing tool. It allows to process information through a graph of processors. It may be used to build mailing lists, fax gateways, email filters, PDF mailing combinators, report systems and many other processes
OpenSubsystems is set of business components such as security, search, inventory management, able to run on various J2EE servers or just using JVM thanks to unique middleware abstraction layer and repository of common application functionality patterns
The sasql SquirrelMail plugin lets users change a pre-defined set of SpamAssassin settings when those settings are stored in a SQLDB rather than a config file.
Tortoise Mail is a POP3 and SMTP E-Mail Client written in PHP. By using PEAR Package DB, it supports many SQL-Based Databases (dbase, fbsql, ibase, ifx, msql, mssql, mysql, oci8, odbc, pgsql, sqlite, sybase). It is also PHP 5.x compatible.
IMAP4 server working on top of SQL database (currently PostgreSQL but Oracle may work too). It has some unique features like elimination of duplicate messages throughout the whole system, possibility of clustering or load balancing etc.