Re:How to Run Your Own Mail Server (2017)
by nerpderp83 on Monday January 29, 2018 @07:21PM
(#16261858)
Postfix has a very clear separation of concerns and least privledge in the use of lots of helper daemons. Exim4 doesn't not have this architecture and is less secure because of it.
http://www.postfix.org/OVERVIEW.html