List of mail server software
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This is a list of mail server software: mail transfer agents, mail delivery agents, and other computer software which provide e-mail.
Product statistics
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. As of December 2023[update], Postfix and exim appeared to be the overwhelming leaders in mail server types, with greater than 92% share between them, having come to prominence before 2010 in each case. While such methods are effective at identifying mail server share for receiving systems, most large-scale sending environments are not listening for traffic on the public internet and will not be counted using such methodologies.
SMTP
- agorum core
- Apache James
- Axigen
- Chasquid
- Citadel
- CommuniGate Pro
- Courier
- Eudora Internet Mail Server
- Exim
- FirstClass
- Gordano Messaging Suite
- Haraka
- HCL Domino / formerly IBM Lotus Domino
- hMailServer
- IceWarp Mail Server (formerly Merak 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
- Poste.io
- Postfix
- PowerMTA
- qmail
- qpsmtpd
- RaidenMAILD
- Scalix
- Sendmail
- Smail
- SparkEngine
- Stalwart Mail Server
- Sun Java System
- Surgemail
- vSMTP
- WinGate
- WinWebMail
- XMail
- Zimbra
- ZMailer
POP / IMAP
- 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 (formerly Merak Mail Server)
- Ipswitch IMail Server
- HCL Domino / formerly IBM Lotus Domino
- Kerio Connect
- Kopano
- Mailtraq
- MDaemon
- Mercury Mail Transport System
- Microsoft Exchange Server
- Mirapoint Email Appliance
- Novell GroupWise
- Novell NetMail
- Open-Xchange
- Oracle Beehive
- Oracle Communications Messaging Server
- Qpopper
- RaidenMAILD
- Stalwart Mail Server
- UW IMAP
- WinGate
- WinWebMail
- Zarafa
- Zentyal
- Zimbra
JMAP
- Apache James
- Cyrus IMAP server
- Stalwart Mail server
Mail filtering
- Anti-Spam SMTP Proxy
- Axigen
- Bogofilter
- Clearswift Secure Email Gateway
- DSPAM
- fdm
- Gordano Messaging Suite
- IceWarp Mail Server
- Libraesva
- MailChannels
- MailScanner
- Mailtraq
- MDaemon
- Mimecast
- MIMEDefang
- procmail
- Proxmox Mail Gateway
- PureMessage
- Rspamd
- SurfControl
- SpamAssassin
- Thexyz
- WinGate
- Webroot
- Proofpoint, Inc.
Mail server packages
- docker-mailserver
- iRedmail
- Maddy Mail Server
- Mail-in-a-Box
- Mailcow
- Mailu
- Modoboa
- Mox
- Postal
- Poste.io
- Stalwart Mail Server
Tools
- Swaks (Swiss Army Knife for SMTP)