OK so I *think* I know what's happening - The person I was trying to message, and we have been messaging back and forth all day, now has their inbox full.
Instead of it sending me to a page that tells me it cant be sent because his message box is full, Im getting a 500 error instead.
That makes sense as I have been able to receive and reply to other PMs since I made this thread (Thanks everyone) but not to the person I was replying too.
So no big deal, but you know who you are and if you are reading this, I think your box is full lol
