[exim-dev] [Bug 1788] Some deliveries not re-attempted after…

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Autor: admin
Datum:  
To: exim-dev
Alte Treads: [exim-dev] [Bug 1788] New: Deliveries to one ISP sometimes fail silently after T=remote_smtp defer on first delivery attempt
Betreff: [exim-dev] [Bug 1788] Some deliveries not re-attempted after 'T=remote_smtp defer (-53): retry time not reached for any host' on first delivery attempt
https://bugs.exim.org/show_bug.cgi?id=1788

--- Comment #7 from Alex Presland <exim@???> ---
While waiting to have absolute confirmation from "user@???"
that an email didn't arrive, some more emails have gone missing. One of these
was for "user@???" and I've received confirmation that the
email did NOT arrive.

The anonymised logs for this individual email are:

2016-02-08 08:21:47 1aSh4t-0003V1-QJ SA: Debug: SAEximRunCond expand returned:
'true'
2016-02-08 08:21:47 1aSh4t-0003V1-QJ SA: Debug: check succeeded, running spamc
2016-02-08 08:21:48 1aSh4t-0003V1-QJ SA: Action: scanned but message isn't
spam: score=-5.3 required=5.0 (scanned in 1/1 secs | Message-Id:
CA+ZcJFrNWHKoMQ2iAaiYXX9M9YgxDZGQ8k54YiHbe41e2+jTrw@???). From
<mailinglist-bounces@???> (host=localhost [127.0.0.1]) for [SNIP],
first5.last5@???, [SNIP]
2016-02-08 08:21:48 1aSh4t-0003V1-QJ <= mailinglist-bounces@???
H=localhost (bear.myhostdomain.net) [127.0.0.1] P=esmtp S=9039
id=CA+ZcJFrNWHKoMQ2iAaiYXX9M9YgxDZGQ8k54YiHbe41e2+jTrw@???
2016-02-08 08:21:48 1aSh4t-0003V1-QJ => [SNIP]
2016-02-08 08:21:48 1aSh4t-0003V1-QJ == user@???
<first5.last5@???> R=dnslookup T=remote_smtp defer (-53): retry time
not reached for any host
2016-02-08 08:21:48 1aSh4t-0003V1-QJ => [SNIP]
2016-02-08 08:47:13 1aSh4t-0003V1-QJ Completed

This time the email went missing while the queue was being run. The anonymised
logs for this are:

2016-02-08 08:47:08 Start queue run: pid=17360
2016-02-08 08:47:11 1aSh1I-0003Jj-L9 => user@??? R=dnslookup
T=remote_smtp H=mx-ironport.core.plus.net [212.159.9.200] C="250
Fkn91s0020Nc4R901knBdn mail accepted for delivery"
2016-02-08 08:47:11 1aSh4t-0003V1-HY => user@??? R=dnslookup
T=remote_smtp H=mx-ironport.core.plus.net [212.159.9.200]* C="250
Fkn91s0020Nc4R901knBdp mail accepted for delivery"
2016-02-08 08:47:11 1aSh1I-0003Jj-L9 Spool file is locked (another process is
handling this message)
2016-02-08 08:47:13 1aSh1I-0003Jj-L9 => user@??? R=dnslookup
T=remote_smtp H=mx.avasin.plus.net [212.159.8.200] C="250
Fkn91s0010Nc4R901knBat mail accepted for delivery"
2016-02-08 08:47:13 1aSh1I-0003Jj-L9 Completed
2016-02-08 08:47:13 1aSh4t-0003V1-QJ Completed
2016-02-08 08:47:15 1aSh4t-0003V1-HY => user@??? R=dnslookup
T=remote_smtp H=mx.avasin.plus.net [212.159.9.200] C="250
FknD1s0020Nc4R901knFe4 mail accepted for delivery"
2016-02-08 08:47:15 1aSh4t-0003V1-HY Completed
2016-02-08 08:47:16 End queue run: pid=17360

The message queueing started with 1aSh1I-0003Jj-L9 at 08:18:09 this morning,
due to a 421 response from the destination MX.

2016-02-08 08:18:09 1aSh1I-0003Jj-L9 == user@??? R=dnslookup
T=remote_smtp defer (0): SMTP error from remote mail server after initial
connection: host mx-ironport.core.plus.net [212.159.9.200]: 421
avasin10.plus.net Plusnet Cloudmark Gateway Too many connections from same IP
2016-02-08 08:18:09 1aSh1I-0003Jj-L9 == user@??? R=dnslookup
T=remote_smtp defer (0): SMTP error from remote mail server after initial
connection: host mx.avasin.plus.net [212.159.9.200]: 421 avasin10.plus.net
Plusnet Cloudmark Gateway Too many connections from same IP
2016-02-08 08:21:47 1aSh4t-0003V1-HY == user@??? R=dnslookup
T=remote_smtp defer (-53): retry time not reached for any host
2016-02-08 08:21:47 1aSh4t-0003V1-HY == user@??? R=dnslookup
T=remote_smtp defer (-53): retry time not reached for any host
2016-02-08 08:21:48 1aSh4t-0003V1-QJ == user@???
<first5.last5@???> R=dnslookup T=remote_smtp defer (-53): retry time
not reached for any host

Please let me know if there's anything else that you'd like me to provide
(logs, configuration, etc.). Otherwise, I'll start working on getting you that
tcpdump between the server and mx.avasin.plus.net (212.159.9.200 /
212.159.8.200).

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