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