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.[1] As of December 2023, 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.[1][lower-alpha 1] 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

POP/IMAP

Mail filtering

Mail server packages

See also

References

  1. 1 2 "Mail (MX) Server Survey". Security Space. Ontario, Canada: E-Soft Inc. 1 December 2023. Retrieved 19 December 2023.
  2. ↑ "Proxmox Mail Gateway". Proxmox. Retrieved 2021-07-04.
  3. ↑ "Information Protection". Proofpoint. Retrieved 2017-08-30.
  4. ↑ "iRedMail - Free, Open Source Mail Server Solution". iredmail.org.
  5. ↑ Nguyen, Antoine. "Modoboa". Modoboa.
  6. ↑ "mailcow: dockerized - Blog". mailcow: dockerized - Blog.
  7. ↑ "Poste.io".
  8. ↑ "docker-mailserver github". GitHub.
  9. ↑ "Mailu - Insular email distribution as container images".

Notes

  1. ↑ The following server types are mentioned in the Mail (MX) Server Survey but are not represented here - ArGoSoft, GroupWise, InterScan VirusWall, MagicMail, MessageWall, ModusMail, Neon Mail Server, OpenVMS, Post.Office, Trend Micro, VisNetic.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 mentioned in Mail (MX) Server Survey 2023
  3. ↑ uses ESMTP protocol
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