On 7/18/22 4:45 PM, Brandon Long via mailop wrote:
Are they using Windows Mail to send mail through your service via
message submission?
Adding a message-id header is a SHOULD in that case:
https://datatracker.ietf.org/doc/html/rfc6409#page-14
If you're just forwarding, then yes, it's unfortunate.
I see both situations in my logs. I guess I'll fix what I can and tell
the rest of the people that doesn't work anymore. <shrug>
--
Robert L Mathews
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