Hi! I am still getting NDR-s. I uploaded come ndr header to a txt file to test with postmap, and I am seeing the REJECT, so the header_check is working if I understand right. I used this command to test: postmap -vq - regexp:/etc/postfix/header_checks < uploaded_text.txt Output: (...) postmap: dict_regexp_lookup: /etc/postfix/header_checks: =?us-ascii?Q?7E0z14P8WDtXEwmu8gftuT9PHKgHFzkME8KD0jE=3D?= Received: from fmfwd00.freemail.hu (195.228.245.78) by REJECT Received: by fmfwd00.freemail.hu (Postfix) REJECT
postconf -n | egrep 'header_checks|receive_override_options' Output is: header_checks = regexp:/etc/postfix/header_checks but postconf -M | egrep 'header_checks|receive_override_options' gives nothing. Any more ideas what should I check? Thanks On Thu, Feb 16, 2023 at 3:46 PM Wietse Venema <wie...@porcupine.org> wrote: > Spam Petya: > > Hi! > > Thank you for the examples. But the solution is this not working. I wrote > > this to the header_checks: > > /^From: (.*)mailer-dae...@fmfwd00.freemail.hu(.*)$/ REJECT message > > /^Received: (.*)fmfwd00.freemail.hu(.*)$/ REJECT message > > > > Still NDR-s are passing through. Header examples from NDR: > > > > From: mailer-dae...@fmfwd00.freemail.hu (Mail Delivery System) > > Your regular expression matches this just fine: > > $ cat /path/to/file > /^From: (.*)mailer-dae...@fmfwd00.freemail.hu(.*)$/ REJECT message > > $ postmap -q - regexp:/path/to/file <<EOF > From: mailer-dae...@fmfwd00.freemail.hu (Mail Delivery System) > EOF > > Output: > > From: mailer-dae...@fmfwd00.freemail.hu (Mail Delivery System) REJECT > message > > (same results with pcre: instead of regexp:). > > I suggest that you test the above with your header_checks file. > =============================================================== > > Other possibilities: > > - You have misconfigurd header_checks, or you have > receive_override_options in effect. > > postconf -n | egrep 'header_checks|receive_override_options' > postconf -M | egrep 'header_checks|receive_override_options' > > - In your header_checks file, you have an "if /^Subject/" guard > before a "/^From" rule. > > Wietse >
