Welcome to the forums.
The policy that restricts private messages from newcomers is undoubtedly part of our efforts to stop spam in the forums. Private messages are just that...private. The moderators do not monitor them, and we will be unaware of any spam being sent that way to our members unless someone reports it to us. A temporary block on messaging from newcomers is not intended as a slight, but rather a protection for the forums in general.
Was your message from BigMike7 by any chance? He makes it a point to welcome newcomers to the forums, and usually "befriends" them as part of that welcome.