I hope I'll be able to explain what I want/need ?
I thought I've already seen this, but I don't see it anymore so maybe I was wrong...
Is it possible to have the following scenario : post(s) made by a new user are not visible until an admin/moderator validates them.
Once an admin/moderator validates the first message(s) he will no longer need validation and he can freely post messages/replies.
The idea is to avoid having users that post spam messages...