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pkSML
Asked: 2018-04-07 08:28:51 +0800 CST

Postfix - Send spam to different email address

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I've researched for an answer to this question and can't find anything.

I have Postfix running on Debian Stretch. I will soon be setting up Rspamd.

Here's the logic of what I want to have happen when spam arrives:

  • Postfix receives a message from the contact form on my website (via PHPMailer)
  • Postfix sends the message to Rspamd for processing
  • Rspamd flags the message as spam and adds appropriate headers
  • Postfix does NOT send the message to [email protected], but rather [email protected]

From what I gather, it seems that milters do not have this ability. How can this be accomplished?

email

1 Answers

  1. Best Answer

    Postfix can check the headers set by the milter with milter_header_check. The postfix documentation also provides an example:

    The following example sends all mail that is marked as SPAM to a spam handling machine. Note that matches are case-insensitive by default.

    /etc/postfix/main.cf:
    milter_header_checks = pcre:/etc/postfix/milter_header_checks

    /etc/postfix/milter_header_checks:
    /^X-SPAM-FLAG:\s+YES/ FILTER mysmtp:sanitizer.example.com:25

    Just replace the FILTER action with REDIRECT [email protected] and it should work.
    Cf. http://www.postfix.org/header_checks.5.html

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