You can ask as many questions as you like, so long as they are ones I know the answer to :lol:
When you send a PM, the message goes to your Outbox. It remains in the Outbox until the recipient visits his/her Inbox, at which point it is moved from your Outbox to their Inbox. While the message remains in your Outbox you may edit or delete your post if you like.
A copy of the messages you send is also stored in your SentBox, this copy isn't deleted when the recipient reads the PM.
Tam