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Chloe
Asked: 2017-01-04 13:10:19 +0800 CST

How do I clean up my Postfix master.cf file and ensure there is no backscatter?

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I have a master.cf file located here: http://pastebin.com/8rwN69X7

I have a feeling that I do not need both smtp and smtps. I also think I can delete the #465 line. I don't think I need the submission lines either as they seem to be duplicates of stuff in main.cf, but I'm not sure and don't know what they do. I also wanted to make sure there is no backscatter from spam checks.

centos postfix

1 Answers

  1. master.cf and main.cf are totally different beasts.

    master.cf is like a inetd.conf - it controls which of Postfix's daemons are running, which ports and IPs they bind to and the such.

    And yes, you can delete the "#465" line, since it's commented out anyway :)

    With your current master.cf, Postfix will most likely be listening on ports 25 (SMTP), 465 (SMTPS) and 587 (SUBMISSION).

    Backscatter cannot be controlled using master.cf, main.cf is the only relevant config file for that.

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