I just fixed my problem before I saw the last post. I had tried to reset but it did not work, so what I did was I went in and
deleted the account that was giving me the problem sending email. I shut down the IPad, restarted it and opened a new account just as I had done when it was brand new! I used the same user name and same password, saved it all and now it is working
fine. After a lot of frustration all day long, this seemed like one of those "why didn't I think of that sooner" moments!