I’ve been using Spamsieve for some time now on my Mac. For some time it seemed to work well, but as time goes by it seems to be missing many obvious spam messages. Perhaps there is a technical reason why this feature isn’t available, but if not I would highly recommend it be added:
Right click on a message, and give options for adding messages to the Blocklist based on:
From: based on name preceding the @domain-name.
Quite frankly, having to go to the trouble of manually adding things to the White List or Block List is annoying and unnecessary in my view. It’s a good option, but shouldn’t be the only way to manage them.