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Patrick de Brabander
Patrick de Brabander
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Issue

Create custom rule for mailfilter on Subject

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Hi,

Does anybody knows if it is possible to block some mail with spamassassin based on the subject.
I get every day some spam mails with same subject text, but from differrent account

I've found this LINK and created a rule in /etc/mail/spamassassin
But it doesn't work
In Antispam Rules
Thursday, March 04 2021, 03:49 PM
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Accepted Answer

Nick Howitt
Nick Howitt
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Thursday, March 04 2021, 04:59 PM - #Permalink
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Have a read of /etc/postfix/header_checks.
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  • Accepted Answer

    Nick Howitt
    Nick Howitt
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    Thursday, March 04 2021, 06:48 PM - #Permalink
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    Patrick de Brabander wrote:
    Nice option to add in the Webconfig ;)
    Possibly dangerous. I don't know what happens if you make a mistake in a rule that does not parse correctly. I think it can also slow down a mail server quite a lot. I seem to remember that from the references I read years ago when I found and started using this file. I believe the checks get hit multiple times when receiving a single e-mail. Spamassassin may be the better route but I've never investigated it.
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  • Accepted Answer

    Patrick de Brabander
    Patrick de Brabander
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    Thursday, March 04 2021, 05:41 PM - #Permalink
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    Nick Howitt wrote:

    Have a read of /etc/postfix/header_checks.

    Thanks Nick,

    This did the trick.
    Nice option to add in the Webconfig ;)
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