dstiles - 7:30 pm on Jul 12, 2012 (gmt 0)

Depends on why blocked and how legit. I sometimes get clients say "You've blocked email from X" and it turns out the idiots are running a mail server on a broadband line - often static but it's still a supid idea when the whole range is in at least one good RBL. I'm the one who then has to "poke a hole" in the banned block.