Integration Into Mail Systems

• Wrote SpamAssassin with flexibility of integration in mind

• Many have been written:

  • Integration into Mail Transfer Agents (sendmail, qmail, Exim, Postfix, Microsoft Exchange)
  • Integration into virus-scanner MTA plug-ins (MIMEDefang, amavisd-new)
  • IMAP/POP proxies and clients
  • Commercial plug-ins for Windows clients (Eudora, MS Outlook)

• And many more I don't know about!