This is only applicable if this is for a Pop account:
MS has NEVER fixed this and I don't kow why. It's been broken for ages and numerous ROM versions.
When you go through the wizard and you enter (for example)
YOURNAME@YAHOO.COM, it assumes you want imap rather than pop. NO CLUE WHY.
So, what you have to do (and again, I'm assuming you've got a pop account). You have to:
1. select "Other email type" when you set up your email account
2. DO NOT ENTER
YOURNAME@YAHOO.COM It will automatically set you up for Imap. Instead enter
YOURNAME@YAHO.COM or something else, you'll change this later.
3. Make sure that you enter all the other information normally like password and whether this is using an SSL connection or whatever.
4. Change the email address after you have everything set up to your correct
YOURNAME@YAHOO.COM.
Should work after that.
No clue why it always defaults to imap rather than pop but it does if you let it.