If its grayed out, it probably means you host your own email and you're running Exchange 5.5. That's why it's greyed out, you can't block them if you're using Exchange 5.5. We use a spam filter (XWall) to block them.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.