[jira] [Created] (JAMES-4162) Failure to send MDN with outlook

Benoit Tellier created JAMES-4162:
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             Summary: Failure to send MDN with outlook
                 Key: JAMES-4162
                 URL: https://issues.apache.org/jira/browse/JAMES-4162
             Project: James Server
          Issue Type: Improvement
    Affects Versions: master, 3.9.0
            Reporter: Benoit Tellier


Outlook uses MAIL FROM: <> when sending bounces.

THis is a valid practice acknowleged in RFC-8098:

{code:java}
   The envelope sender address (i.e., SMTP "MAIL FROM") of the MDN MUST
   be null (<>), specifying that no Delivery Status Notification
   messages nor other messages indicating successful or unsuccessful
   delivery are to be sent in response to an MDN.
{code}

But as of today James sender enforcement forbids user to use `MAIL FROM: <>` thus making MDN fails.

 - We need to relax this logic
 - please note that the header From is however still strictly enforced



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