[Mimedefang] More problem with timeouts

[worldoff9908 at address.com]

I posted this question a few weeks ago, but didn't really get a response after I
when I made a typo in the version of sendmail I said I was running.

I'm still having difficulties, and still don't have any clue as to why I'm
having problems.  I checked the recent threads discussing timeout issues, and
haven't found anything that quite fits my situation.  I'm not running syslog. 
I've also seen the suggestion to run MD with the -k switch, but can't find where
to actually specify that -- in any case, I don't know if that relates to my
problem or not.

My current software setup is:

- RedHat 7.2
- Sendmail 8.12.9 (installed from source RPM)
- MIMEDefang 2.29
- SpamAssassin 2.55
- RAV 8.4.3

RAV is being run as a milter called by sendmail, and not being launched from
MIMEDefang.  I'm also making use of several DNS blacklist calls, but these are
also being called from sendmail, rather than through MIMEDefang.

My difficulties with timeouts started happening about a month ago, when I
upgraded RAV from version 8.3 to 8.4.  The problems have been intermittent,
although we had a big burst of them about 10 days ago (while I was out of town).

It seems that the problem is much less frequent if I restart the MIMEDefang
daemon two or three times in a day, but that doesn't really solve the underlying
problem, so much as it makes the symptoms go away.

I have quoted a relevant fragment from my sendmail log, below.  It appears that
the timeout is happening following more than 1 minute of non-response.  In my
sendmail.mc, I have MIMEDefang defined:

INPUT_MAIL_FILTER(`mimedefang',`S=unix:/var/spool/MIMEDefang/mimedefang.sock,F=T,T=S:1m;R:1m')dnl

For this, it doesn't appear that my server is especially busy.  Typical traffic
runs around 2 messages/minute, and busy spikes rarely exceed 5-6 messages/minute.

Is this something that might resolve itself if I raise the timeout thresholds (2
minutes, 3 minutes, 5 minutes)?  Or is there something else that I need to be
looking for?


Relevant log entries:

> Jul 23 04:08:08 alpha sendmail[8725]: NOQUEUE: connect from bravo [10.10.10.139]
> Jul 23 04:08:10 alpha sendmail[8725]: h6N488gg008725: Milter (RAVMilter): init
success to negotiate
> Jul 23 04:08:10 alpha sendmail[8725]: h6N488gg008725: Milter (mimedefang):
init success to negotiate
> Jul 23 04:08:10 alpha sendmail[8725]: h6N488gg008725: Milter: connect to filters
> Jul 23 04:08:13 alpha sendmail[8725]: h6N488gg008725:
from=<Joe.User at charlie.spamtronics.com>, size=3690, class=0, nrcpts=1,
msgid=<1219288092 at spamtronics.com>, proto=SMTP, daemon=MTA, relay=bravo
[10.10.10.139]
> Jul 23 04:08:26 alpha sendmail[8725]: h6N488gg008725: Milter add: header:
X-RAVMilter-Version: 8.4.3(snapshot 20030212) (alpha)
> Jul 23 04:09:26 alpha sendmail[8725]: h6N488gg008725: Milter (mimedefang):
timeout before data read
> Jul 23 04:09:26 alpha sendmail[8725]: h6N488gg008725: Milter (mimedefang): to
error state
> Jul 23 04:09:26 alpha sendmail[8725]: h6N488gg008725: Milter: data, reject=451
4.7.1 Please try again later
> Jul 23 04:09:26 alpha sendmail[8725]: h6N488gg008725:
to=<someone at somewhere.com>, delay=00:01:13, pri=30568, stat=Please try again later


Thanks in advance.

Smith

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