What is this?
After you log in, you may see this spinning symbol
in the Main Menu, on the left side of the screen. It appears next to the line which says "Check PMs" whenever you have a new PM (Personal Message) waiting to be read.
If you send a PM to a member here, it will be kept in your Outbox, until the intended receiver opens your PM. Then, your PM will be kept in your Sentbox. Each mailbox has a status bar above the list of messages in that mailbox, so you will know when any one mailbox is getting too full.