> On Feb 13, 2017, at 7:21 AM, Marcio Merlone <marcio.merl...@a1.ind.br> wrote: > > I guess postfix is the most deployed smtp server on the globe, isn't it?
There are likely more Exim servers than Postfix servers. Exim is the default MTA for Debian and Ubuntu Linux. Many users don't look past the default. Other users prioritize built-in content inspection features over stability, and security and consciously choose Exim. However, it is my impression that Postfix is more often the choice at larger installations and may handle a greater volume of email. http://www.securityspace.com/s_survey/data/man.201701/mxsurvey.html Server Type Number of Servers Percent ----------- ----------------- ------- Exim 561,833 55.78% Postfix 333,400 33.10% Sendmail 52,456 5.21% MailEnable 23,648 2.35% MDaemon 13,440 1.33% Microsoft 11,881 1.18% ... The numbers may be somewhat skewed by incomplete data: Server provided banner 1,654,893 82.33% Server banner identifies software in use 1,007,317 50.11% The MTA behind some ~40% of live servers was not identified in this survey. It would be possible to further fingerprint by the EHLO reply, responses to invalid commands, ... but this was not done. Regardless of whether Exim or Postfix handles more email, clearly both are quite successful, and between them leave the rest of the MTAs far behind... -- Viktor.
