[ossusermivami]

ah the good old days, when a bunch of MTA was coming out (exim, vmail, qmail and postfix) to replace sendmail cf and m4 atrocities.

It's interesting to see that the most popular who came out as "winner" has been postfix,

altho these days most people would setup a relay with msmtp going to a closed source provider than full fledged postfix/cyrus service

[kiwijamo]

I'm a Postfix guy myself, but I swear I read somewhere that Exim was more popular?

[Drybones]

Yes and no. It’s most likely because exim is the mail manager for cPanel which is still very popular. IMO any server that is non-cPanel with a mail server is most likely using Postfix.