I have downloaded the demo of SpamSieve and trained it for two days and the precision is amazing. One (or two) problem(s) though: Every time I quit Mail and restart the SpamSieve rules i Mail are turned off (they are at the top of the list). Also, I created one Spam folder but suddenly I had two of them. I have two mail accounts so maybe this is normal?
I am using Mail 2.1, Mac OS X 10.4.10 and SpamSieve 2.6.4
The SpamSieve rule is just like any other Mail rule, so if it’s getting disabled that’s a general Mail problem, unrelated to SpamSieve. You might want to try running Disk Utility to repair your disk. It’s only a guess, but that might allow Mail to save its rules to disk.
I saw this problem once before, and it was solved by manually editing the file where Mail stores its rules. Once the rule was enabled, it stayed enabled. If you’d like to go that route, you could quit Mail, then open the file: