MPP and Open Source Email Services
Open source Message Transfer Agents (MTA’s) like Postfix, Exim and QMail still move the bulk of the email on the Internet. MPP provides a total solution to protect, archive and customize open source email. Whether you are running Postfix, Qmail, Sendmail or Exim there is no better application than MPP.
Sure, there are open source tools like AmavisD or Mailscanner or Maia Mailguard but using MPP will save administration time, improve spam detection and provide a better customer experience.
Antispam and Archival for Postfix
Maia Mailguard Replacement
Quarantine Management for SpamAssassin