How about a Sort by "receiver" filed if we want to sort our sent items? Currently it works for only inbox.
I guess its a nice idea.. but does not necessarily required.. we can continue with this..meanwhile what exactly the problem you are facing?
Nothing much, I just wanted to find a PM I sent to someone so that I could copy/paste, but I guess I can type it again, so no issues.
One solution I can recommend you is you can select some messages which you think is important and need in future and download it as txt or excel(option is available at the place where we delete messages).. you can save it on your pc and search it locally in notepad when required. hope this helps..