This is a typical section of the log file that starts with the failure...
Nov 2 10:42:03 oslo mimedefang-multiplexor[15811]: Killing busy slave 1 (pid 17209): Busy timeout Nov 2 10:42:03 oslo mimedefang[17903]: Error from multiplexor: ERR Filter timed out - check filter rules or system load Nov 2 10:42:03 oslo sendmail[17902]: iA2HfX9j017902: to=<[EMAIL PROTECTED]>, delay=00:00:30, pri=32632, stat=Please try again later
Looking at this, it seems it's MX_BUSY being set too low, just as David pointed out earlier. mimdefang-multiplexor killed the slave, and instructed Sendmail to tempfail the message. Sendmail should have logged another line just after it got 'MAIL FROM', (grep for iA2HfX9j017902 in logs). It will give you an idea for how long MIMEDefang was processing the email, before it gave up. If what David pointed out to you is correct, the time difference will match your current MX_BUSY seting (give or take couple of seconds). Try boosting MX_BUSY to 600 (10 minutes) or even 900 (15 minutes).
BTW, don't let huge mails go through SpamAssassin. Anything larger than say 100k isn't likely to be spam, and it will take *really* long time and huge amount of memory for SpamAssassin to digest large emails.
-- Aleksandar Milivojevic <[EMAIL PROTECTED]> Pollard Banknote Limited Systems Administrator 1499 Buffalo Place Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7 _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
