Imagine if your email daemon could be configured with a syntax similar to pf.conf - you're in luck, because OpenSMTPD exists and you can!
(Many of us out there have serious m4 trauma.)
are you recommending iptables as an example of 'better' ?!
Re:OpenBSD: Why and How (2016)
by brobdingnagians on Wednesday November 13, 2019 @11:40AM
(#21526069)
No. Reverse that.
https://man.openbsd.org/pf.4
https://man.openbsd.org/pfctl
https://man.openbsd.org/pf.conf#EXAMPLES
vs
https://linux.die.net/man/8/iptables