Currently Being ModeratedJan 25, 2013 9:11 AM (in response to hawkeyext)
I take it there is no backup. I would back everything up and reinstall the OS over itself and see if the Mail program returns. Hopefully it finds the support files and the emails come back. I've reinstalled Lion and ML over themselves several times with no issue. You should just rerun software update upon completion.
Others may know how to surgically reinstall the Mail program but I do not. Mail is part of the OS.
Currently Being ModeratedJan 25, 2013 9:15 AM (in response to hawkeyext)
Use Recovery HD to reinstall OS X, so Mail will be reinstalled with all its files.
To start into Recovery HD, just press Command and R keys while your Mac is starting, and reinstall OS X. Reinstalling OS X, you won't lose any file, but it's highly recommended to make a Time Machine backup and/or a clone with Carbon Copy Cloner, and not only when you want to reinstall (although you aren't going to lose anything). You always have to make a backup, because all hard drive fails and you will lose data when this happens
Currently Being ModeratedJan 25, 2013 9:42 AM (in response to hawkeyext)
Note that you won't lose anything with Recovery HD unless you erase the disk on Disk Utility first, because you can erase the disk and reinstall OS X with Recovery HD if you want