Call me amazed, total moment with email here:

An email off the Mailgun MTA (coming from TechRepublic) just got the best reject reason I've seen: DMARC milter refused it, citing
'RFC5322 requirement error: not exactly one Date field'.
This causes a `5.7.1 Command rejected` from Postfix at the end of the `DATA` command.

How in the *world* do you screw that up, two Date headers?!?!

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