Like everyone here, I have been trying relentlessly to clear my Iphone 4 of the annoying multitudes of autofill email addresses. Half of them I do not even recognize, nor will I ever email them again so it's been very upsetting to see them on my phone! I searched high and low for an answer to this problem, and came up empty handed each time. I have been SO frustrated. I could not believe that Apple could not provide an answer for this, when clearly the issue is a glitch with the phone itself.
I just want to thank the person ("itkws") who posted the information about iBackupBot! I downloaded the free version also, and followed each step. After all was done, my iTunes opened automatically and completed another sync and then I tentatively opened up my phone to see if everything looked "normal!" To my amazement, it not only looked perfect, but the long list of annoying autofill emails were GONE! Nowhere to be found on my phone!
I am SO VERY GRATEFUL! You saved the day! 🙂
Cheers
I LOVE my iPhone again!