What is the difference between Block and Blacklist?
When you block a spam mail, SPAMfighter takes a snapshot of the contents of the email and sends it to the SPAMfighter server. If other people block the same message, it’s filtered out for the rest of the community. Notice that you don’t block the sender’s email address, but only that specific message you received. The reason for not blocking the email address is that spammers use random spam addresses all the time, so it won’t help a bit.