If I recall correctly, Exim is also the MTA installed by default into CPANEL Web servers. (I surmise that because I'm still on the Exim mailing list, from more than a decade ago, and I would have no reason to be on that list otherwise. So long ago...)
Interesting point: when I worked at a Web hosting company that offered Plesk and CPanel, mail was a sore point with both systems. So I build some robust front-end mail servers, using PostFix, which was the relay in and out for all those servers. That let me concentrate spam control into one pair of servers, bidirectionally, and also deal with some delivery issues with the major mail providers like Google, AOL, Yahoo, and a few others. One of those issues was "you're sending too much mail too fast" -- so the PostFix throttling features made short work of the remote server flooding problems rather nicely. I also monitored the flow of mail, and was able to detect PHP compromises quickly, before my customers would be blocked. (N.B.: that flood detector meant that I worked on about 12 PHP sites each workday, and sometimes over the weekend. Fortunately, the exploits were easy to find and mitigate.) Spammers? Of course there were spammers. They got terminated. On 02/13/2017 07:45 AM, Viktor Dukhovni wrote: > 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% > ...
