After skimming through this, I navigated around this Chris Siebelmann's site with the forward and back links, discovering something way more interesting than Unix strings and refreshingly relevant:
I run Exim, and I'm also a huge believer in blocking spam at the SMTP level, and also do some things globally that should perhaps be per-user. I'm eagerly interested in everything this fellow has to say.
I've followed his site for awhile, and he seems like a thoughtful person who likes to document his reasoning. I'm not a sysadmin, so I don't care about a lot of what he writes, but he's worth reading for stuff I care about. For example, he's pretty astute about the "how" and "why" of spam.
"How I do per-address blocklists with Exim"
https://utcc.utoronto.ca/~cks/space/blog/sysadmin/EximPerUse...
I run Exim, and I'm also a huge believer in blocking spam at the SMTP level, and also do some things globally that should perhaps be per-user. I'm eagerly interested in everything this fellow has to say.