Can't delete emails on my ipad

I found out that if you click edit then on the message that you want to delete then click move at the bottom then when the next window pops up click move to trash. Then it goes to trash with no problem.

I am still having trouble deleting email. Where will I find the advance settings bit that was mentioned earlier?

Thank You! So much I have been trying to resolve this issue for ages & your instructions worked. Can't thank you enough it's been driving me mad.

Connected to wifi