[Mimedefang] Strange tempfails

[Cormack, Ken]

Group,

Below I have pasted log entries demonstrating some unexplainable tempfails
I've been seeing in the last couple days.

I've tallied about a dozen different senders to whom this has happened, but
there seems to be one sending domain in particular, that is getting hit by
this when they try to send to us.  The messages ultimately do come through,
but only after dozens of attempts, and up to a day's delay.

My server's sendmail load varies throughout the day, but averages 20-40.
Sendmail's confQUEUE_LA is 48, confREFUSE_LA is 60.

Sar shows the machine is typically busy throughout the day (averaging 5-20%
CPU idle.  Disk activity is usually around 8-18% (I use a RAM disk for
/var/spool/MIMEDefang), and disk freespace is never a problem.

The log entries show that the milter is tempfailing the message, but I cant
find a cause.

Sendmail's confLOG_LEVEL is 14, and confMILTER_LOG_LEVEL is 9.

Anyone have any suggestions?

Ken

Jan 12 10:23:16 mail01 mimedefang.pl[17463]: l0CFNEno020499: Received-SPF:
none (mail01.mydomain.com: domain of SmithKA at somedomain.com does not
designate permitted sender hosts) , Helo=dc-ex002.wki.somedomain.com
Jan 12 10:23:21 mail01 sendmail[20499]: l0CFNEno020499:
from=<SmithKA at somedomain.com>, size=10642, class=0, nrcpts=1,
msgid=<E1FE22372F4069438EBC1247E992C8A10706007F at gn-ex001.wki.somedomain.com>
, proto=SMTP, daemon=MTA, relay=host2.somedomain.com [xxx.xxx.xxx.xxx]
Jan 12 10:23:32 mail01 sendmail[20499]: l0CFNEno020499: Milter: data,
reject=451 4.3.2 Please try again later
Jan 12 10:23:32 mail01 sendmail[20499]: l0CFNEno020499:
to=<Jolynda.Emerick at mydomain.com>, delay=00:00:13, pri=40642, stat=Please
try again later