New rule (Headers) Mailing list relay with multiple beenthere headers#3884
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New rule (Headers) Mailing list relay with multiple beenthere headers#3884
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This rule detects messages relayed through mailing lists or groups with multiple X-BeenThere headers, indicating potential mailing list abuse or routing manipulation.
Added condition to check if sender's root domain is not in sender domains.
github-actions Bot
added a commit
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this pull request
Jan 28, 2026
…-BeenThere headers
github-actions Bot
added a commit
that referenced
this pull request
Jan 28, 2026
…ltiple X-BeenThere headers
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Author
|
Too many FPs and was just testing this out at a global level. Gonna close it out. |
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Description
This rule detects messages relayed through mailing lists or groups with multiple X-BeenThere headers, indicating potential mailing list abuse or routing manipulation.
Associated samples
Associated hunts