It's just a security precaution. You're allowed to send private messages, but the recipient doesn't get a full copy of the message to their email inbox and they get a big red warning on the forum PM inbox to say it was sent from a relatively new account. It's just in case someone set up a new profile trying to impersonate a more senior member. This limits the risk of anyone attempting to defraud someone by false representation or some other sort of scam that could be enabled by pretending to be someone else. It's the same for all new accounts and nothing to worry about.
It's also possible admins may check or review some of the messages from newbie accounts and delete them if there's anything suspect going on. Once in a while I get an email saying I had received a PM from a newbie account, but when I log in to the forum to check it, no new PM is there. I assume I'm not missing anything important, heh. They shouldn't be deleting yours if it's a genuine message.
OH Thanks DooMAD My man for the reply I was bit upset due to that msg.
Now feel good. Actually my msg related to crypto analysts, hope it is still genuine and it wont be deleted by the admin.