I do some technical works at forum linked to permissions and user groups.
As it was announced few months ago we will move regular users to other groups from "Registered users" group. "Registered users" group will be for just registered users with up to 5 posts. Users of this group will post messages to forum via moderation. It is spam/scam prevention measures.
In case you have more than 5 posts and your message has no sign @ in post and still is going to moderation, please PM me or write here and I will check what's going wrong.