I am observing the following error message in the logs for one specific list:
= = = relay=email-smtp.us-east-1.amazonaws.com[35.168.84.210]:587, delay=0.27, delays=0.05/0.04/0.12/0.06, dsn=5.0.0, status=bounced (host email-smtp.us-east-1.amazonaws.com[35.168.84.210] said: 554 Transaction failed: Duplicate header 'DKIM-Signature'. (in reply to end of DATA command)) = = =
As I mentioned, this happens for one single list only and this list has not been able to send any email for a week now. After checking mailman-users, I came across the following setting, which seems kind of related to my issue:
= = = To distribute messages with valid DKIM signatures, I set remove_dkim_headers: yes in /etc/mailman3/mailman.cf = = =
Here are my questions: 1 - I have around 100 lists and this happens for this one list only, so, I am not sure, if the issue might be solved with this change. 2 - Because this happens for this one list only, I would rather change it for this one list only, is there any option available changing it for one list only and not for the whole server?
Thanks M