OSX Lion Server - Mail Server All Mail Lost

Hi

Can anyone help.

I opened my mail client and found a blank mail box. It appears that all of my mail that I host on Lion Server has just vanished. I checked it via my iPhone 30 minutes prior to accessing the mail.app on my imac and all of my mail was visible. I then checked on my iPhone and slowly watched my mailbox contents vanish on my iPhone.

I'm at a loss as to what has happened and I can retrieve the email via a backup I did a day ago; however I have had some important mail since then and I appear to have lost them.

I'm truly finding OSX Lion Server to be a real pain where as Snow Leopard Server worked pretty well.

If anyone can assist I'd be really grateful.

Thank you