Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.

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v18 DKIM Verification Failing on Messages with Multiple Signatures

ChrisKnight

Howdy,

 

Anyone else seeing v18 failing DKIM verification with invalid DKIM signature for inbound messages that have multiple signatures?

Every e-mail with multiple signatures is sitting in quarantine as that's how I've configured the action for invalid DKIM signatures.

The DMARC RFC (rfc7489) suggests a Pass if any of the signatures is aligned and verifies.

Having to turn this check off as the messages sit in quarantine and no-one receives a quarantine digest e-mail (does quarantine digest even work?).



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  • FormerMember
    0 FormerMember

    Hi ChrisKnight,

    Could you please provide smtpd_main logs in debug to investigate this issue. 

    You can use this command to put smtpd service in debug: service smtpd:debug -ds nosync

    Use same command to remove debug. 

    Thanks, 

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