Well you are posting as normal, what makes you feel you are blocked? There are no facilities to partially block members, you are either a member or not. Non members cannot post on certain boards and some boards do not host discussions.
Is it still happening? Perhaps ProBoards were deflecting malicious postings from an IP range. I have been caught up in that before. Certainly no one is blocking you here so if it is still happening we need to talk to proboards.
But you are posting so I guess whatever was wrong is fixed.