mailcow-dockerized-docs/docs/local_mta.md
2017-05-06 00:22:26 +02:00

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The easiest option would be to disable the listener on port 25/tcp.
**Postfix** users disable the listener by commenting the following line (starting with `smtp` or `25`) in `/etc/postfix/master.cf`:
```
#smtp inet n - - - - smtpd
```
Restart Postfix after applying your changes.