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MDaemon Email Server
MDaemon Logo.svg
Developer(s)MDaemon Technologies, formerly Alt-N Technologies
Initial releaseJuly 31, 1996; 22 years ago (1996-07-31)
Stable release
19.0.1 / May 14, 2019; 23 days ago (2019-05-14)
Operating systemMicrosoft Windows
Available inEnglish, Chinese, French, German, Italian, Japanese, Portuguese, Russian, Spanish
TypeCollaborative software

MDaemon Email Server is an email server application with groupware functions for Microsoft Windows,[1][2] first released by Alt-N Technologies in 1996.[3][4]


Mdaemon supports multiple client-side protocols, including IMAP, POP3, SMTP/MSA, webmail, CalDAV, CardDAV, and optionally ActiveSync for mobile clients and Outlook, and its Connector for Outlook add-on.

MDaemon's features include a built-in spam filter with Heuristic and Bayesian analysis, SSL and TLS encryption, client-side and server-side email and attachment encryption, public and shared folder support, mailing list, and support for sharing of groupware data (calendar, contacts, tasks & notes).[5][6][7] It is also the basis for MDaemon Tech's Security Gateway for Email Servers.

According to's Mail (MX) Server Survey from June 2018, MDaemon provides approximately 1 percent of all known Internet mail servers, the fifth largest installation base from all identified servers.[8]


  1. ^ Kossel, Axel (July 1998). "Postboten und Alleskönner – EMail-Server für Windows NT". c't Magazin (in German). 1998 (07).
  2. ^ "简评 MDaemon Server v9.52". Retrieved 11 July 2018.
  3. ^ "Переход с MDaemon на Exchange Server 2003/2007 (Часть 1)". Retrieved 11 July 2018.
  4. ^ "Alt-N No Longer a Subsidiary of RIM but MDaemon BES". Archived from the original on 13 June 2015. Retrieved 11 July 2018.
  5. ^ "MDaemon Pro: Still a Mail Server That Professionals Can Rely On". ServerWatch. 2002-12-18. Retrieved 2018-07-23.
  6. ^ "Review: ALT-N MDaemon Messaging Server 15". winmag pro. 2015-09-12. Retrieved 2018-07-23.
  7. ^ "MDaemon Pro Mail Server 9.5.6". PC&Tech Authority. 2007-06-28. Retrieved 2018-07-23.
  8. ^ "Mail (MX) Server Survey". 1 June 2018. Retrieved 2 July 2018.