(When I was younger, I was told by a veteran sysadmin that only 5 persons in the world knew how to configure Sendmail directly, everyone else was relying on preprocessing scripts written by the aforementioned wizards).
Edit: my point is that Postfix is actually quite easy to configure, compared to Sendmail which was the standard in the 90s.
I'm embarassed to say that I wrote Postfix when I meant Sendmail! I might just go ninja-edit that now :)
Ha! When I jumped into Linux during the summer of 95, I spent many many days and nights writing directly sendmail.cf rules, because I could not understand and use any of those damn M4 scripts... Handwriting sendmail.cf parts was more straightforward for me (for some value of 'straightforward').
20 years later, I have yet to get around to grasping M4.
Sendmail.cf deserves its reputation.
Hah; I had to look at a sendmail config a while back for a legacy server. It's line noise.