June 2, 2020
4:44 p.m.
Periodically, I've seen these errors from few senders, and wondering if community has a idea? Mailman - 3.3.1rc1 Tom Sawyer
"554 Transaction failed: Duplicate header 'DKIM-Signature'" while sending AWS-SES as the MTA?
Possible to strip from postfix? I've submitted a AWS ticket.