Disappearing e-mail files after renaming them?

For Mac users:

If you renamed an e-mail file folder and your e-mails in that folder disappeared, open mac mail, put the original name back on the folder, click on that folder with the now original name, then click on mailbox at the top of your screen, scroll down and click "rebuild" at the bottom of the drop down.

All the e-mails should show up again for that folder. I just recovered more than 700 e-mails in two dozen folders. I sure hope it works for you.