Private Messages Track Messages - A better approach
 

Why the track messages isn't a default option when sending a message? (does it have something to do with queries?)
Also there should be just an icon for the delivered/readed message report on the outbox with a "Tick Icon".
When a user go to the outbox folder* in the outbox list there should be a little icon with a "tick" that shows that the message has been readed or an icon with another symbol that indicates that the message is pending to be read.

What we get in conclusion?
One less menu in the My Profile* and the ability to check many messages at once if the message has been delivered/readed. :)