At the moment we as using fetchmail (SLES9, 6.2.5) to pick up our
emails (for approx 200 users) from our multidrop box. Everything
works fine as long as the receivers address is in the TO: header.

for example To: <firstname.lastname@to_domain.tld>

Our problem is that when users are on a mailling list, the email with the following headers

To: <mailing.list@from_domain.tld>
X-Envelope-To: <firstname.lastname@domain.tld>

is delivered to postmaster account because the To: address is not recognised. These mails must be then manually forwarded (from admin)
to their receivers.

Question?

How do we have to setup fetchmail to use the X-Envelope-To:
header if the To: header is not recognised. Will this have any
side-effects for SPAM and such.


This is our /etc/fetchmailrc

defaults proto pop3
set postmaster postmaster@to_domain.tld
poll post.provider.tld localdomains to_domain.tld:
user "postmaster@to_domain.tld" with pass "mypass" to * here


Your Help would be very welcomed, as our users are complaining
that the emails are taking to long to arrive.
(mostly they are mails with iron/steel/copper prices)

Best Regards

Frieling