How do I delete redundant email addresses from the cached lists?
Restore your phone as a new device in iTunes, or wait until the data is overwritten as you use your phone. There is no way to access this data & delete it directly on the phone.
This doesn't seem to help. Let me repeat my problem. When I start an email, and type in the first few letters into the address, the iPad produces a cached list of email addresses. In some cases the recipient has changed his email address, so two or more addresses are shown for that recipient. I have deleted the redundant address from Contacts, but the cached list keeps repeating it, and it is usually at the top of the list. How do I delete the redundant one from the cached list?
I've already answerd your question, whether you like the answer or not. Either restore your device as "new" in iTunes or learn to live with it. There is no way to access this data directly on the device itself & edit it, at least not in the present iOS. Perhaps Apple will add a way to edit this in the future, but for now it is what it is.
It may not have helped but it is the correct reply.
Easy, go to mail, press the square at the bottom right hand side with the pen in it as if you were going to write an email. Next to the To: type in A. All your contacts starting with A will show up below so when you come across one you don't want, press on it then press on the circle at RHS with the + in it. scroll down to where you see review recents (or something like that, I'm sorry I had a big clean up a few weeks ago) press, then that address will disappear.
Now you've just got to go through the rest of the alphabet to get rid of them all. Note: I had success with 99% of mine but there are few just refusing to budge I'm afraid and I'm just not sure why. I am talking about an iphone here BTW.
See reply from lingerlonger below, it actually works.
Then be careful to NOT UPGRADE to iOS9. In the new version Apple had REMOVED this ability. 👿😢⚠
How do I delete redundant email addresses from the cached lists?
