Editing List of mail server software (section)

==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.<ref name=mxsurvey/> {{As of|2023|December}}, [[Postfix (software)|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.<ref name="mxsurvey">{{Cite web |date=1 December 2023 |title=Mail (MX) Server Survey |url=http://www.securityspace.com/s_survey/data/man.202102/mxsurvey.html |access-date=19 December 2023 |website=Security Space |publisher=E-Soft Inc. |publication-place=Ontario, Canada}}</ref>{{efn|name=n3|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.}} 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.