Hi *,
My google-foo is failing me at this point, so I turn to you all. I
am using a standard Postfix setup and am sending messages via
Thunderbird. I am choosing under the Options menu "Delivery Status
Notification". The results:
- DSN's for email sent to gmail work fine
- DSN's for email sent to yahoo work fine
- DSN's for email sent to a local account on my mail server
work fine
There is one specific mail server though that I am not receiving
"successful delivery" DSN's for, and I cannot figure out why.
The following is the conversation log from my server to theirs:
Nov 30 16:39:19 bigbertha postfix/cleanup[18162]: 78861CCFF:
warning: header Subject: asasddsad from
c-98-197-129-225.hsd1.tx.comcast.net[98.197.129.225]; from=<rjo...@eggycrew.com>
to=<redacted> proto=ESMTP helo=<[192.168.2.3]>
Nov 30 16:39:19 bigbertha postfix/qmgr[16356]: 78861CCFF:
from=<rjo...@eggycrew.com>,
size=805, nrcpt=1 (queue active)
Nov 30 16:39:19 bigbertha postfix/smtpd[18337]: disconnect
from c-98-197-129-225.hsd1.tx.comcast.net[98.197.129.225]
Nov 30 16:39:21 bigbertha postfix/smtp[18341]: 78861CCFF:
to=<redacted>, relay=redacted[redacted]:25, delay=2.5,
delays=0.18/0/0.43/1.9, dsn=2.0.0, status=sent (250 +OK
message queued for delivery.)
Nov 30 16:39:21 bigbertha postfix/qmgr[16356]: 78861CCFF:
removed
Given that the remote mail server is returning a "250" status,
why would I not get a successful DSN? The return code looks
exactly the same as mail to a test yahoo account that I *did*
get a successful DSN generated for:
Nov 30 16:38:28 bigbertha postfix/cleanup[18162]:
17F73CCFF: warning: header Subject: test from
c-98-197-129-225.hsd1.tx.comcast.net[98.197.129.225]; from=<rjo...@eggycrew.com>
to=<redacted> proto=ESMTP helo=<[192.168.2.3]>
Nov 30 16:38:28 bigbertha postfix/qmgr[16356]: 17F73CCFF:
from=<rjo...@eggycrew.com>,
size=785, nrcpt=1 (queue active)
Nov 30 16:38:30 bigbertha postfix/smtp[18341]: 17F73CCFF:
to=<redacted>,
relay=mta5.am0.yahoodns.net[67.195.168.31]:25, delay=2.2,
delays=0.16/0.01/0.28/1.7, dsn=2.0.0, status=sent (250 ok
dirdel)
Nov 30 16:38:30 bigbertha postfix/bounce[18342]: 17F73CCFF:
sender delivery status notification: 3827D74091
Nov 30 16:38:30 bigbertha postfix/qmgr[16356]: 17F73CCFF:
removed
I have a feeling I am misunderstanding what communication takes
places behind the scenes when a DSN is requested. If someone
could shed some light on it for me, that'd be awesome :)