slackware 11.0
spamassassin version 3.2.3
running on Perl version 5.8.8
mimedefang 2.63
sendmail 8.14.0

My issue is that it appears that spam is getting through without being
scanned. I get a spam message, then run spamassassin -t < message and
it scores high enough to get marked as spam. I don't know if it's some
problem with the milter between sendmail and mimedefang, like a timeout
or something, or what.

I don't think I get more than 30 messages per minute at peak times, so
this seems that this wouldn't be the case. Is anyone else having this
same issue?

Any help is appreciated