Re: mail stuck in transport queue

[Matti Aarnio <mea@nic.funet.fi>]

On Wed, Jun 18, 2003 at 12:05:56PM -0400, Francis Lau wrote:
> Hi All,
> 
> For some reason, my zmailer (version 2.99.55) can't send mail to email 
> addresses in the form of user@utoronto.ca.  The mail gets stuck in the 
> transport queue when zmailer tries to send it:

Unless "mailq -Q" lists  utoronto.ca  as "too busy", or some such,
you may get some additional clues from scheduler's log-file.
"tries=0" is -- sort of give-away, there is definite problem, but what ?

Things may go "boom", e.g. the transport agent drops a core for some
reason (it has happened in the past, can't say it won't happen in the
future), and when that happens, internal state becomes rather blurred.

The "tries" counter gets incremented only when the transport agent
reports "defer" (or "retryat") condition, "ok*" and "error*" conditions
are rather definite removals from the queue.

> [root@setup5 zmailer-2.99.55]# mailq
> smtp/utoronto.ca:
>         X/208465-2902:  (retry in 29s, expires in 2d23h, tries=0)
> 
> I am using the default scheduler.conf.
> 
> Initially, I thought it was a problem with smtp/*, but when I try to send 
> a message to user@uwaterloo.ca it is fine.
> 
> Any ideas would be helpful.

 Check  $MAILLOG/scheduler   and if the transport agents are dropping
 core.  If the core-files are of name "core",  the  "mailq -ss" will
 report them.  (Latter systems have begun to make  "core.xyz.123",
 perhaps I should add a way to detect those, too.)   For cores to
 drop, "ulimit -c unlimited" is possibly necessary.

> Thanks a lot,
> Francis
-- 
/Matti Aarnio	<mea@nic.funet.fi>
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