I have recently rescued two comments from the spam filter. I’m sorry that it sometimes trips up and flags legitimate comments as spam. If you post a comment and don’t see it, please email me immediately. I’m happy to make up for Movable Type’s shortcomings and manually approve them. But the volume of spam-comment submissions is so high that I’m unlikely to notice your comment unless you contact me. So again, if you post and it doesn’t show up, let me know.
If you are running MT I highly recommend installing this plugin: http://alogblog.cafe24.com/movabletype/plugins/ccodeandtcodeformt_40/
It’s great. The bots don’t stand a chance against it. Only a few human-entered spams slip through.