There's a programme called "Auto Archiver", a friend uses it and says it's pretty good. I can't try it out as I use only Mac and Linux. There also used to be a lot of free archiver type programmes for Windows but not sure if they're still available. The programmes save all typing automatically and the files can be restored at any time. Too late for you now but maybe worth trying for the future. Actually your email might still be there on the hard drive but most likely been overwritten by something else by now.