I am trying to diagnose why messages from on system fail to arrive
whereas identical messages from another similar system arrive
successfully.
Both systems are single board computers running postfix 2.9.6 under
Debian. The main.cf on both systems is identical. Both systems are
connecting to the same SMTP server for relaying.
On the system where the message is sent and received successfully I
see (in /var/log/mail.log):-
Feb 18 17:32:51 pi postfix/pickup[25898]: 2009B22C52: uid=1000 from=<chris>
Feb 18 17:32:51 pi postfix/cleanup[25978]: 2009B22C52:
message-id=<20170218173251.2009b22...@pi.zbmc.eu>
Feb 18 17:32:51 pi postfix/qmgr[21159]: 2009B22C52: from=<ch...@zbmc.eu>,
size=294, nrcpt=1 (queue active)
Feb 18 17:32:52 pi postfix/smtp[25980]: 2009B22C52: to=<ch...@zbmc.eu>,
relay=mail3.gridhost.co.uk[95.142.156.18]:587, delay=0.97,
delays=0.15/0.11/0.36/0.35, dsn=2.0.0, status=sent (250 2.0.0 from
MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 08DEC26AEC71)
Feb 18 17:32:52 pi postfix/qmgr[21159]: 2009B22C52: removed
On the system that appears to send OK but the message never reaches its
destination I see:-
Feb 18 18:32:18 odin postfix/pickup[15648]: 05E963BC3: uid=1001 from=<chris>
Feb 18 18:32:18 odin postfix/cleanup[15989]: 05E963BC3:
message-id=<20170218173218.05e963...@odin.zbmc.eu>
Feb 18 18:32:18 odin postfix/qmgr[14084]: 05E963BC3: from=<ch...@zbmc.eu>,
size=296, nrcpt=1 (queue active)
Feb 18 18:32:19 odin postfix/smtp[15991]: 05E963BC3: to=<ch...@zbmc.eu>,
relay=mail3.gridhost.co.uk[95.142.156.18]:587, delay=1.2,
delays=0.22/0.11/0.65/0.19, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as
EDA7EE0C39)
Feb 18 18:32:19 odin postfix/qmgr[14084]: 05E963BC3: removed
Does that 'queued as EDA7EE0C39' in the second case mean that the message
has been put on a queue rather than being sent? But why? The messages
are virtually identical, the destination address is the same, etc.
If I send a message from the unsuccessful system to a *different* destination
then it arrives OK, but the messages in the mail.log are the same as above.
--
Chris Green
