It sounds like there could be a setup problem. It could be that SpamSieve is not even looking at those messages or that they are being accepted because of your Filters settings. Please see this page.
My Blocklist contains an entry in the format provided in the manual: “From (address) Ends With .nl”. This doesn’t block email from this country; I have to manually train each as spam.
There’s no conflicting entry in my Whitelist.
I’ve studied the manual and haven’t found anything that works.
Oh yeah, I’m using SpamSieve 2.9.28 with Apple Mail 10.2 (3259).
I’m sorry. I sent you the wrong link. This is the one that explains how you can check the setup and the log. If you still can’t figure it out, you could send in a diagnostic report.
Thanks for the manual reference. Following the directions, found the SpamSieve rule wasn’t configured correctly. Changed it, tested it with email from .nl and everything worked. Let’s see if it works with new emails.