Odhiambo Washington writes:
If you have lists using different email addresses, then you just substitute the $h_to in another filter rule.
But then maybe Mr. Thomas Ward uses Postfix or Sendmail, in which case this is all useless/greek to him :)
If he's done any MTA configuration, I'm sure he'll treat it as pseudo-code and translate to the language he needs without trouble. So please don't hesistate to provide code from your site (appropriately redacted, of course) even if you know the OP uses different software.
The big question about the usefulness of these posts is whether his users have RFC 3834 conforming vacation programs that know about the Auto-Submitted field.
I didn't know my homework bot was conformant until I just checked -- thank you Exim4!
Steve