Because they send out “helpful” notices to people who send their customers viruses via email.
So, their mail server is intelligent enough to realize that someone has sent a virus to a customer? Fine, that’s good customer service.
But then they email the “From:” address letting the “sender” know that they have sent a virus. Ridiculous! Their system should know that the virus is faking both the To: and the From: address, and the system should then silently erase the message. And now that I’ve gotten nearly 100 of these “warnings” I am ready to complain to them about mailbombing me.