We recently had some major problems with ripmime that perhaps I can save some of you some frustration. ripmime started pegging the processor of our mail servers at 99% on multiple machines and would run until killed.
Matt pointed out to us that the version or ripmime in ports is v1.3.2.3 - 30-July 2004 and suggested that we upgrade to 1.4.0.5 via:
http://www.pldaniels.com/ripmime/ripmime-1.4.0.5.tar.gztar -xzf ripmime-1.4.0.5.tar.gz
cd ripmime-1.4.0.5
make
make install
Before this upgrade, our servers would go possibly 15 to 20 minutes before the ripmime would go out of control. After a few hours the ripmime problem seems to have gone away.