Problem with MailScanner failing to process mqueue.in mail

[Jim Holland]

Hi

I have been running MailScanner 4.35.9-1 with Sendmail 8.13.1 without any
problems from November until this evening.  Suddenly the volume of mail in
the mqueue.in directory started to increase without explanation, and while
most mail is being delivered successfully, more and more messages are
just being repeatedly reprocessed without being delivered.  See log for a
typical message below.

I have tried restarting MailScanner, and even cleaned out the queue
manually.  However the problem keeps resurfacing.

Can anyone advise what could be happening here?  No MailScanner
configuration files have been changed recently, and only minor changes
have been made to sendmail configuration files (mailertable - to forward
certain mail to a specific host - and virtusertable - to add some more
users).  Neither of these changes should have made any impact.

There are no relevant errors listed in the sendmail maillog file, apart
from signs of some messages being processed ad infinitum.

Regards

Jim Holland
System Administrator
MANGO - Zimbabwe's non-profit e-mail service

Jan  6 22:39:37 mail sendmail[17918]: j06KdaZ7017918: from=<user at mango.zw>, size=8737, class=0, nrcpts=1, msgid=<944800817 at p3775.f1.n7211.z5.ftn>, proto=ESMTP, daemon=MTA, relay=fido.mango.zw [192.168.10.1]
Jan  6 22:39:37 mail sendmail[17918]: j06KdaZ7017918: to=<user at mweb.co.za>, delay=00:00:01, mailer=esmtp, pri=38737, stat=queued
Jan  6 22:40:24 mail MailScanner[11052]: Message j06KdaZ7017918 from 192.168.10.1 (heavens at mango.zw) is whitelisted
Jan  6 22:42:34 mail MailScanner[11317]: Message j06KdaZ7017918 from 192.168.10.1 (heavens at mango.zw) is whitelisted
Jan  6 22:43:29 mail MailScanner[11218]: Message j06KdaZ7017918 from 192.168.10.1 (heavens at mango.zw) is whitelisted
Jan  6 22:44:15 mail MailScanner[19384]: Message j06KdaZ7017918 from 192.168.10.1 (heavens at mango.zw) is whitelisted

etc etc

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