Do you have an email address that says you have one unread but you don't? Well I got a fix for that.
1) make sure you have iFile.
2) open iFile and navigate to /var/mobile/Library/Mail.
3)When there, create a new folder. It can be named anything you'd like.
4) Find three files named "Envelope Index", "Envelope Index-shm", and "Envelope Index-wal".
5) Copy those three files and paste them into the folder you just created.
6) once done, delete those files from where they were originally from. Not the ones you just put in the folder!(If confused, you will be deleting the three files you just copied from where you copied them)
7) once you have deleted those files, open Mail. It may crash first time but just reopen.
8) go to email that had problems and look at unread. Should be there
Any questions, just ask
1) make sure you have iFile.
2) open iFile and navigate to /var/mobile/Library/Mail.
3)When there, create a new folder. It can be named anything you'd like.
4) Find three files named "Envelope Index", "Envelope Index-shm", and "Envelope Index-wal".
5) Copy those three files and paste them into the folder you just created.
6) once done, delete those files from where they were originally from. Not the ones you just put in the folder!(If confused, you will be deleting the three files you just copied from where you copied them)
7) once you have deleted those files, open Mail. It may crash first time but just reopen.
8) go to email that had problems and look at unread. Should be there
Any questions, just ask