Private Messages

[Fred]

When your pm box is full or getting full and you delete the messages there .......you must then empty the trash can or the mails will still be there

So #1 click delete on any messages you don't want to keep in your inbox and sent box
Then #2 go to the Trash folder and delete all in there to free up the space

I don't use the trash can.

I just wait till it's nearly full (or get a reminder) and click "Empty  Folders" from the menu on the PM page. From there you can tick the box against which folders you want to empty.