🚀 go-pugleaf

msir@uhura.cc.rochester.edu writes:
   What I think I want to do is create an alias in sendmail's alias file which
   will cause a message to bounce, but with a particular message.

With apologies for a certain tendency to grotesque hacks, try this:
	some-expired-user:	"|/usr/local/lib/expire-bounce"
where /usr/local/lib/expire-bounce consists of
	#!/bin/sh
	echo 500 User no longer on system.
	exit 1
which results in bounces of the form:
	   ----- Transcript of session follows -----
	500 User no longer on system.
	554 "|/usr/local/lib/expire-bounce"... unknown mailer error 1

--karl