Q: If you're blocking spam, why am I still getting them?

A: ISPs constantly make changes to block and/or reject mail. The problems begin when the spammers change the header or the body of the message. One simple change makes the spam a whole new message
For example is the title is Viagra. They can change the word to V'iagra or V-i-a-g-r-a. As you can see the possibilities are endless. Every time the title or the body of a message is changed ISPs have to start all over in blocking that message. On an average, servers block 1/2 million spam a day. The task is daunting. .