Re: Question about DSN

[Sebastian Nielsen]

As the subcodes say that "transformation was required for delivery", it sounds like the mail was converted across formats, or content was omitted. This can happen if a server decides to strip all attachments or the mail did contain something unparseable that the server decided to pass along without touching or omitting the unparseable content altogether.

Sent: Thursday, July 02, 2015 6:36 PM
To: postfix-users@postfix.org
Subject: Question about DSN

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

Note how it says X.6.0, where for example 5.6.0 would indicate unsuccessful delivery due to undefined media error, while 2.6.0 would indicate that it was a successful delivery despite the error. -----Ursprungligt meddelande----- From: Michael Peter

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