How to prevent the Mail app from restoring its previous state? The Mail app on my iPhone 5s crashes while launching. I assume that it is trying to restore its last state. Unfortunately that last state was what originally crashed it. So restoring that state results in a Mail app that will always crash on start up. What can I do to prevent the Mail app from restoring its last state on start up?

I already tried the following:


disabling all Mail accounts
send myself a mail to launch the Mail app from lock-screen
closing the Mail app
rebooting the phone
contacted Apple support - only to find out that restoring an old backup is the only thing they know will help


I do not want to restore from a backup, because it is probably not possible to restore the Mail app backup only.
I finally fixed the issue without data loss. Here is what I did:


Created a backup from the iPhone while the Mail app was still broken
Run Restore iPhone... within iTunes (I tried Restore Backup... which did not fix the issue)
After the iPhone was reset to its factory defaults I set it up using the backup I did in 1.