Hi,

for postfix log file /var/log/maillog, we notice that following line

1198B1E111: to=<u...@example.com>,
relay=mail.example.com[XXX.XXX.XXX.XXX]:25, delay=20,
delays=4.3/0.01/1.8/14, dsn=2.6.0, status=sent (250 2.6.0 Queued mail for
delivery)

The DSN is 2.6.0 INSTEAD of 2.0.0,

is DSN is 2.6.0 is considered successful delivery? because according to
the rfc3463

rfc3463:

 2.XXX.XXX   Success

         Success specifies that the DSN is reporting a positive delivery
         action.  Detail sub-codes may provide notification of
         transformations required for delivery.

X.6.0   Other or undefined media error

         Something about the content of a message caused it to be
         considered undeliverable and the problem cannot be well
         expressed with any of the other provided detail codes.


So this means that 2.XXX.XXX is considered delivered without problems..
but in the same RFC is says that 2.6.0 means undelivered error...

So i am confused  if DSN=2.6.0 means that the email is accepted without
problems? and why the receipt mail server is giving 2.6.0INSTEAD of 2.0.0
?? why receipt server would give DSN2.6.0 ?

I appreciate your feedback.

Thanks

Michael Peter

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