Changing mail view back to list view using voice over.

If you don’t like the new iPhone mail categories
Do the following,
1 open up the mail app by looking for mail on your iPhone and double tapping
or say Siri open mail
2 swipe to more and double tap.
Swipe to list and double tap.
You now have set your mail app back to list view

set up “Back Tap” on your iPhone

To perform various actions. Here’s how:

1. Go to “Settings” on your iPhone.
2. Scroll down and double tap on “Accessibility.”
3. Under “Physical and Motor,” double tap “Touch.”
4. Scroll down and select “Back Tap.”
5. Choose either “Double Tap” or “Triple Tap.”
6. Select the action you want to trigger when you tap the back of your phone.