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Postfix: log message from, to and subject
Published: 28-03-2009 | Author: Remy van Elst | Text only version of this article
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This is a little trick for Postfix, it lets you log the subject, from and
to of all the emails postfix sends (or which pass through it if you run it as
a relay). It comes in handy when you need to debug an email issue and need to
confirm your mailserver has sent the message.
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First create the file /etc/postfix/header_checks and insert this into it:
/^subject:/ WARN
/^to:/ WARN
/^from:/ WARN
/^Subject:/ WARN
/^To:/ WARN
/^From:/ WARN
Now, in your postfix /etc/postfix/main.cf add the following to the end of the
file:
header_checks = regexp:/etc/postfix/header_checks
And restart postfix:
service postfix restart
You will hopefully now get log items like below, and if not you have a problem with your mailserver:
Dec 4 08:23:05 localhost postfix/cleanup[2278]: 90CA714: warning: header
Subject: This is a testmail which gets logged from localhost[127.0.0.1];
from=<root@localhost> to=<root@localhost> proto=ESMTP helo=<localhost>