Én ezt a header_check-el oldottam meg:
/^(From|To|Cc|Reply-To):(.*)@businessmails.info/ DISCARD
/^(From|To|Cc|Reply-To):(.*)@e-mailmarketing.info/ DISCARD
/^(From|To|Cc|Reply-To):(.*)@email-plus.net/ DISCARD
/^(From|To|Cc|Reply-To):(.*)@hirlevelkuldes.com/ DISCARD
/^(From|To|Cc|Reply-To):(.*)@mailgun.info/ DISCARD
/^(From|To|Cc|Reply-To):(.*)@mailgun.org/ DISCARD
/^(From|To|Cc|Reply-To):(.*)@mailgun.us/ DISCARD
/^(From|To|Cc|Reply-To):(.*)@openadsweb.com/ DISCARD
/^(From|To|Cc|Reply-To):(.*)hirlevel@silicondreams.hu/ DISCARD
/^From:(.*)@(.*),(.*)@/ DISCARD
Meg még ez is jól jöhet :D
/^X-Spam-Probability:(.*)high/ DISCARD
/^X-Spam-Asap:(.*)CONFIRMED/ DISCARD
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Debian Linux rulez... :D