For future reference it's better to look in Restore Points using ShadowExplorer than to run the restore point, for data. If it's some system problem keeping things from running right, that's another matter. But once you run the restore point, you've overwritten the files on the live system. Chances of getting it back are reduced.

It's worth it to pick up a USB 2.0 external drive for copying data and system image backups. There are several free backup programs that can help you recover from disaster. Also many of the image backup programs let you mount a system image to a drive letter. If I permanently delete a file sometimes I can bail myself out by mounting my last image backup and just copying that file out to the HD.

Macrium Reflect and Easus ToDo backup free versions both have that feature (and probably several other programs I don't know about.)

If this does not work and you tried shadow explorer, Im afraid that the old Widows Mail 2006, was not current enough to work properly
Recuva - Undelete, Unerase, File and Disk Recovery - Free Download

Yes you can import and export (save), as shown in an earlier post.
There are many free email services. Many like Thunderbird, you may just want to the most current of Windows Mail
Top 11 Free Email Programs for Windows - About Email