Recover deleted messages
I accidentally deleted some messages so i reset my phone to set it up off my last backup and all of my messages haven’t come back. How can I recover all of my messages? Please help.
If the messages aren't being stored on the mail server and aren't in iCloud backups and/or local backups, those messages are no longer available.
If the messages were stored on and were deleted from the mail server, your mail provider may have a means of restoring those from mail server backups.