User messaging system (PHP / MySQL)?

I agree with @Eddsstudio: when the user sends a message put a copy of it in the "sent folder" and copies in the recipients inbox's. For any replies: create a new message in the primary senders inbox, not linked to the previous messages (i.e. No link to the message in the sent folder).

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.