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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?).
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.