As a new user, I’ve made some mistakes on webpages that were marked for white or block lists. How can I delete them both and recreate them through “teaching”?
In most cases it’s sufficient to just re-train the message the correct way. Or, if you want to completely reset SpamSieve, you can quit SpamSieve and your mail client and then delete the folder /Users/<username>/Library/Application Support/SpamSieve/.