I purchased SpamSieve and have so far been happy with it’s ability to do what it claims.
Lately when I find an item in my Junk email folder and click the Apple Mail - Message Menu - “SPAM SIEVE TRAIN AS GOOD” the item disappears from my Junk folder but never reappears in my Inbox. I do not know where the message goes. It simply disappears. This used to work and does not now.
I’m using SpamSieve 2.9.29