The two servers I've worked on today are both running Imail 7.15 - 2003.03.11.7. When the SMTP32 process dies, the last line it writes to the log on each server was a line about connecting to the designated DNS server on port 53 (presumably to do a DNS lookup):
09:20 19:57 SMTP-(00000630) Connect ###.###.###.### [###.###.###.###:53] (0)
I've just looked through a 100 MB log file for IMail 8.05, and I can't find a single occurrence of ":53]". And I certainly don't ever remember observing the _SMTP_ processes logging info about the _DNS_ protocol actions.
Is your IMail box in debug logging mode?
After the above line appears in the log, no further lines from SMTP (or SMTP-) appear in the logs, only the SMTPD lines for incoming mail being processed. Watching the process list, the SMTP32 process never spawns. The process will never spawn again until SMTPD is restarted. There have been times when the process stops spawning for hours before someone notices it and restarts SMTPD, and with the volume of mail these servers receive, the queue quickly becomes virtually unmanageable.
Does anyone have any suggestions as to what might be causing these issues? It's getting to where I have to spend several hours a day babysitting these Imail servers and trying to clean up the backed-up queues...
1) Setup a windows machine with the MS SMTP SVC and use it as an outbound relay where ...
2) your Imail servers' SMTP "send all mail through gateway" field contains the IP of the gateway machine.
Imail SMTP will not have to do any DNS lookups because it's dropping all outbound on a single IP.
If using the outbound gateway stops your Imail boxes from dying, you will have freed yourself from the nightmare and restored good service to your users. And that "fix" would be an useful result in analyzing why Imail was stopping.
Len
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