Keld Simonsen:
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> On Sun, Jun 27, 2010 at 11:33:02AM -0400, Wietse Venema wrote:
> > I checked out a few details, and the result is that turning on
> > VERP, before sending to a mailing list alias, does not turn on VERP
> > when delivering to the members of that mailing list (except in a
> > very special case that involves only local recipients).
> >
> > It can (and should) be made to work outside that special case, but
> > that requires a few changes to Postfix internals, and that will
> > take more time than I have available now.
> >
> > There is a workaround to turn on VERP after the mailing list. For
> > example, deliver mail to the mailing list alias with one Postfix
> > instance, then deliver mail to the members of that list with a
> > second Postfix instance that turns on VERP via one of the methods
> > in message <20100626210934.27b7e1f3...@spike.porcupine.org> (this
> > involves content filters, or the Postfix 2.7 smtpd_command_filter
> > feature).
>
> maybe there should be a note on this in the documentetion, eg in
> http://www.postfix.org/VERP_README.html
>
> Does this mean that the VERP facility has not been fully functional
> at any time, and thus that there have not been that many attempts on
> utilizing it before? During the discussion on this list on VERP there
> were very few contributions from other people than Wietse. So the
> lack of use could explain this.
Currently. VERP does not survive local(8) alias expansion except
perhaps in a very special case.
> I thikn VERP could be a very useful thing to me - having spent many hours
> trying to track down erroneous email addresses on the lists I administer.
>
> I wonder if it was generally possibly to set postfix to send envelope
> return addresses for all outgoing messages, eg by a parameter somewhere
> in master.cf ? Is that posssible, and would there be any problems
> in doing that?
With the command line: "sendmail -f senderaddr"
With the SMTP protocol: MAIL FROM:<senderaddr>
Wietse
