This is a list of mail server software: mail transfer agents, mail delivery agents, and other computer software which provide e-mail.
Product statistics[edit]
All such figures are necessarily estimates because data about mail server share is difficult to obtain; there are few reliable primary sources—and no agreed methodologies for its collection.
Surveys probing Internet-exposed systems typically attempt to identify systems via their banner, or other identifying features;[1] and report Postfix and exim as overwhelming leaders in March 2021, with greater than 92% share between them.[1]
SMTP[edit]
- agorum core
- Apache James
- Axigen
- Citadel
- CommuniGate Pro
- Courier
- Eudora Internet Mail Server
- Exim
- FirstClass
- Gordano Messaging Suite
- Halon
- Haraka
- hMailServer
- IBM Lotus Domino
- IceWarp Mail Server
- Ipswitch IMail Server
- Ironport
- Kerio Connect
- MailEnable
- Mailtraq
- MDaemon
- Mercury Mail Transport System
- MeTA1
- Microsoft Exchange Server
- MMDF
- Novell NetMail
- OpenSMTPD
- Openwave Systems
- Open-Xchange
- Oracle Beehive
- Oracle Communications Messaging Server
- Postfix
- qmail
- qpsmtpd
- RaidenMAILD
- Scalix
- Sendmail
- Smail
- SparkEngine
- Sun Java System
- WinGate
- Zimbra
- ZMailer
POP/IMAP[edit]
- agorum core
- Apache James
- Axigen
- Bongo
- Citadel/UX
- CommuniGate Pro
- Courier Mail Server
- Cyrus IMAP server
- Dovecot
- Eudora Internet Mail Server
- FirstClass
- Gordano Messaging Suite
- hMailServer
- IceWarp Mail Server
- Ipswitch IMail Server
- IBM Lotus Domino
- Kerio Connect
- Kopano
- Mailtraq
- MDaemon
- Mercury Mail Transport System
- Microsoft Exchange Server
- Novell GroupWise
- Novell NetMail
- Open-Xchange
- Oracle Beehive
- Oracle Communications Messaging Server
- RaidenMAILD
- UW IMAP
- WinGate
- Zarafa
- Zentyal
- Zimbra
Mail filtering[edit]
Mail server packages[edit]
- Mail-in-a-Box
- iRedmail[4]
- Modoboa[5]
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