I just read your PM and it is something that happened to me not many days ago. It is a protection of the server against spam but sometimes it fails. You don't need to send it to me, I couldn't post it either, even though I'm a mod, the forum would send me the same error message. The admin said a few days ago that he would remove that protection after doing some checking, I told the admin again so he wouldn't forget about this problem, we have to wait.