A Zero Spam Mail System [Feedback Request]

[valdis.kletnieks at vt.edu (valdis.kletnieks at vt.edu)]

On Wed, 20 Feb 2019 20:22:51 +0000, Matthew Black said:
>  Have you ever created a sendmail.cf without using M4?

Sendmail 5.6mumble or so, for a machine that was on UUCP, Arpa/Milnet, and
Bitnet and gatewayed between them.  Bitnet was particularly ugly because (a)
EBCDIC and (b) no way to represent a null line in NJE.  Bonus points for the
bisync interface card that claimed to do DLE stuffing for SDLC but didn't...

And of course, approaching any address that had all 3 of  %, ! and @ in them 
was loads of fun because the semantics depended on which interface they
came in on...