Just realize that this is not an isolated incident.... so I am posting the instructions here.
In the forum, go to "My Messages" in the top navigation bar. On the left hand side, you would see a navigation box, click on "New Message".
In the next page, type in "the nickname of the player" in the "To:" box. Add a subject. Then type the password and whatever else you would like to say in the message body, and click "send message" when you are done.