Hacked and now iphone email not working

My email was hacked and hacker had rerouted all email to their account.  I figured that all out, changed my password and got rid of the rerouting but I cannot get my email to work on my iphone.  It keeps saying the username and password is incorrect. I have entered username/password that work on my desktop but my iphone keeps saying its not right.  I guess hacker could have corrupted my iphone account somehow?  I have deleted and reentered multiple times.  I have also restarted iphone.