Yes. If you check here:
http://www.thetradersden.org/forums/private.php
and go to Private Messages in Folder->Sent Items, you will see a small icon to the left of the PM's you have sent.
If you check the 4 icons where it says Legend you can see if it is an Unread Message, Read Message, if you Replied-to Message or Forwarded Message.
I don't know if you can see when the read it, if they did.
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