I am using 10.11.1 Everything was fine until upgrading to the latest version of SpamSieve. Before, it was catching twenty to forty junk mails a day. Now, six. I told it to reinstall the plug in (using apple’s mail) The commands are there and when I select messages and tell it to train them as spam, it dutifully does so and moves them to the spam folder. However, it still will not catch them automatically, even if they are the same spam senders with the same titles.
I moved your post to a new thread because you posted it in the thread for El Capitain betas, and it sounds like you’re not using a beta version. If SpamSieve is not catching messages automatically, that usually indicates a problem with the rules in Mail. Please see the Checking the Apple Mail Setup page.