After my upgrade to 10.9 Mavericks, I had SpamSieve working fine. Then, a couple of weeks ago, Apple issued an update to Mail that fouled it up. I had to re-download and re-install the plug-in. After that, it SpamSieve seemed to have forgotten what was spam. It all showed up in my inbox.
Now when I mark a message as Spam, it is moved to the Spam folder as expected, but when I receive the same spam again, it ends up in my inbox.
The corpus is viewable and extensive, but SpamSieve does not automatically move any messages to the Spam folder.
Any help would be appreciated.