# Customize/Expand main.cf

Please create a new file `data/conf/postfix/extra.cf` for overrides or additional content to `main.cf`.

Postfix will complain about duplicate values once after starting postfix-mailcow, this is intended.

Syslog-ng was configured to hide those warnings while Postfix is running, to not spam the log files with unnecessary information every time a service is used.

Restart `postfix-mailcow` to apply your changes:

    docker-compose restart postfix-mailcow

Last update: 2022-02-02 10:57:04
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