More details on postfix mail log

a2940uw

Hi,
I using a Graylog appliance success to receive mail log send from the mailcow server without problem, I would like to the log message can output more details such as mail subject, I know postfix can use use the smtp_header_checks to do this, and I updated the syntax “ :/^subject:/ WARN” to the postfix file “anonymize_headers.pcre” , this is allowed and how to reload this file ? or restart the postfix container should be ok ?
Thanks

a2940uw

I was followed the tutorial https://mailcow.github.io/mailcow-dockerized-docs/u_e-postfix-extra_cf/ to expand the main.cf and then apply extra config header_checks = regexp:/opt/postfix/conf/header_checks , now all mail log including the subject header.

mailcowUser0815

It dosn’t work for me. Has anyone an idea?

This are my commands:

cd /opt/mailcow-dockerized/

nano data/conf/postfix/extra.cf
Insert:
header_checks = regexp:/opt/postfix/conf/header_checks

nano data/conf/postfix/header_checks
Insert:
/^Subject:/     WARN

docker-compose exec postfix-mailcow postmap /opt/postfix/conf/header_checks

docker-compose restart postfix-mailcow

But the postfix log contains no subject.

ralfbergs

I can’t get this working either…

Apart from that, there is now a “better” way to log the subject.

Instead of using an “action” of WARN (which seems too “strong” just to log an item useful for debugging), you can now (as of Postfix 2.8) use the INFO action instead, which logs an info: record.

(The fact that you have to use such work-arounds just to log the subject seems weird, but that discussion would be off-topic here…)

safalsth

you don’t need to create separate header_checks file. just navigate to /opt/mailcow-dockerized/data/conf/postfix
and add the following line in anonymize_headers.pcre file.
/^{Subject|subject}:/ WARN
then restart postfix. this worked for me.