Dear Enrico,
Am 06.05.26 um 10:36 schrieb Enrico Morelli via Postfix-users:
On Wed, 6 May 2026 10:20:51 +0200 Paul Menzel via Postfix-users wrote:
Am 06.05.26 um 10:13 schrieb Enrico Morelli via Postfix-users:
I've a Debian 11 mail server with Postfix 3.5.25. I've configured
Postfix to filter the headers with: header_checks = pcre:/etc/
postfix/header_checks.pcre
However, some emails with subjects listed in the file are still
delivered.
E.g.
/^Subject:.*Pulitore.WC.Più.Votato.2025.*/ REJECT
A positive test result:
postmap -q "Subject: Pulitore WC Più Votato 2025"
pcre:/etc/postfix/header_checks.pcre REJECT
Why Postfix don't reject the email? Where I've to investigate? After
writing a new entry in header_checks.pre, have I to reload Postfix?
Please look at and share the actual header entry Subject in the
emails. Often they are encoded, and Postfix header checks don’t
decode it. You need to use a milter for this usecase.
The subject is the following:
Subject: Pulitore WC Più Votato 2025
I thought due to the ù, it’d need to be encoded. Where did you copy this
from? In Thunderbird you can press Ctrl + u to look at the message
source. The email should also be stored in some file, and you could look
into it directly?
Kind regards,
Paul
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