Private Messages - Outbox vs. Sent Messages

When you send a Private Message (PM) to another forum user, it will remain in your Outbox until it is opened by the recipient. It then automatically goes to "Sent messages".
If a PM remains in your Outbox, it does not mean the message has not been sent. It has, it just hasn't been opened by the recipient yet.
There are 2 advantages to this:
If a PM remains in your Outbox, it does not mean the message has not been sent. It has, it just hasn't been opened by the recipient yet.
There are 2 advantages to this:
- You can edit or delete a PM as long as it's in your Outbox.
You can tell whether or not your message has been opened by the recipient.