macOS 11.1 SpamSieve 2.9.41
The following has happened twice to me recently. Is there anything I can do about it. BTW, I don’t use Norton.
I thought I could attach a picture but I can’t figure out how. In any case what happens is that I get an alert from SpamSieve that says "The message "Get a Norton AntiVirus Plus annual membership…could not be moved to “Spam 75”
Are you using Apple Mail? Does this occur for messages that are automatically filtered or does it happen when you select a message and choose Train as Spam?