[Mailman-Developers] FWIW: Postfix does VERP

[Dan Mick]

> At least as of the snapshot I'm running, 20010714, postfix does VERP just
> as you'd expect, merely by adding -V to the "sendmail" invocation.
> (It works with multiple addresses, too.)  Hmmm; maybe it's time to
> play around with Sendmail.py again.
> 
> There seems to be no way to invoke such behavior through an
> SMTP connection (not surprisingly).

I lied: EHLO reports that XVERP is an optional command, and indeed
MAIL FROM: <from-addr> XVERP is legal and generates a VERPed address.

Hmm.  Maybe this SMTP extension is already "defined".  Sure looks
like one could hack SMTPDirect.py to use it.

Hmm, hmm, hmm.