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[Asrg] DKIM and NDR
As a side benefit of DKIM all emails, it should be possible to filter NDRs by looking in the attached email (which generated the NDR) if there is a valid dkim header.
I know some MTA do not include the email, nor the full email but a lot do.
This would help weeding out NDRs which have been created due to fake emails
Is that make sense?