List of mail servers

This is a list of mail servers: mail transfer agents, mail delivery agents, and other computer software which provides email services.

SMTP

• Sendmail
• Postfix
• qmail
• Exim
• ZMailer [1]
• Courier (software) [2]
• MMDF [3]
• Microsoft Exchange Server
• Scalix [4]
• XMS ArcMail Management System [5]
• ArGoSoft Mail Server [6]
• Merak Mail Server [7]
• Kerio MailServer
• MailEnable Mail Server [8]
• Mercury Mail Transport System [9] (A free server for Windows)
• OPEN-XCHANGE Server
• Apache James [10]

POP/IMAP

• UW IMAP – uses mbox format.[11]
• Courier IMAP – uses Maildir format.[12]
• hMailServer [13] – MySQL-based, open source, GPL for MS Windows
• Microsoft Exchange Server
• Cyrus IMAP server [14]
• Stalker Communigate Pro [15]
• ArGoSoft Mail Server [16]
• Merak Mail server [17]
• Kerio MailServer
• MailEnable Mail Server [18]
• Mercury Mail Transport System [19] (A free server for Windows)
• Dovecot [20]
• Apache James
• dbmail [21]

Mail filtering

• Procmail
• Vipul's Razor
• SpamAssassin
• Bayesian filters
• MailScanner

  This list is incomplete; you can help by expanding it.