Spam filtering -it doesn't work!!
Try to block a domain and it's useless because the names have a "." embedded.
Example: I'm gettin a lot of junk from xxxx@xxxxx.onmicrosoft.com
Can I block "onmicrosoft.com" ? Nope, not a hope!
Are BT blocking it? Nope!
Am I getting a lot of junk? Yep! Sure am!