Blocklist rule

Sometimes, I receive emails where the From name is blank. I created a rule in Blocklist that read:

From (name) is equal to [the rest I left blank]

and I clicked the checkbox.

It seems to work for awhile but today I looked at the rules and found the checkbox off. Why?

It’s a safety feature. If you train a message as good that would have matched one of the blocklist rules, SpamSieve will disable that blocklist rule.