Since upgrading this afternoon to 2.9.28 on 10.12.3 using Mail app, my Inbox is now filled with spam, but, at least, my SPAM box is pretty light. Any ideas?
A sudden change like that probably means that they are not false negatives, but rather that Mail is not sending the messages to SpamSieve for analysis. Please check your setup.
Thanks. Seems the rule for SpamSieve had toggled “off”. Toggling “on” solved the problem. It’s odd – I ran the upgrade after quitting Mail, just as I always do; no other action.