I have two CentOS-6.4 servers, in different places. I am running postfix/amavis on one, and sendmail/procmail on the other. I don't recall having any difficulty setting up sendmail many years ago using sendmail.mc . But I found postfix very complicated to setup last year. (It's working fine now.)
I recall that when I asked for advice one person advised me to read 2 books on postfix, and another advised me to pay someone to set it up.
I asked why postfix was preferable, but didn't any convincing reply. The general response was along the lines that it was the "modern" way.
Having looked into postfix/amavis a little further, it seems to me to involve excessively complicated processes (at least for a simple home server) with email going along spaghetti-like routes.
Am I alone in this view?