From: Flavien (flavienfreesurf.fr)
Date: Wed Apr 19 2006 - 17:13:13 CDT

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Hello,

Some background:
We're running an alumni mailserver. We've got "permanent email
addresses" : Graduates get "firstname.lastnamemydomain.org" emails
that are redirected to their current email. We're using postfix. It
works quite well except with some email providers [*] : The
messages go to the junkmail box, mainly because the user is not
in the destination field of the message. The feedback we get from
our userbase is "alumni emails do not work, I don't get emails
that are sent to me". It's just not true, it's unfair to us, poor
(volonteer) admins. We'd like to fix it ! :o)

The idea we got is to add a special transport in our configuration
in order to get those mails go through a script that will add the
final address to the "To:" header, so that it's not detected as
spam. [Oh, well...]

So, I added a transport like so :
$ grep explicit transport
.addexplicitdestination addexplicitdestination:
$ tail -2 master.cf
addexplicitdestination unix - n n - - pipe
  user=somebody argv=/usr/local/bin/addexplicitdestination $recipient

It basically works, except that the mail I now send (as "somebody"),
has its return-path set to "somebodymydomain.org", which is not
what I want. Obviously, I'd like it to stay the same as it was before
getting into my script... Or may be I'd like to be even smarter and
set it to something like "personbounces.mydomain.org" so that I can
process bounces in a more friendly manner, but that'll be for the
next version.

Is there a way to get the return-path & sender info in my script
somehow ? (I could I guess write a fake smtpd but I'm looking for
something simpler)

Thanks for your help !

Flavien.
[*] FWIW: the domains that we get problems with are hotmail & msn.

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