With no change on my end my POP mail from Yahoo to Outlook stopped working! July 22 2013;
I deleted and attempted to re-enter.
It says  I don't have Plus account.. wrong!
 I have had both Yahoo & Hotmail plus accounts since 2004.
I deleted the yahoo account and re-entered everyday since and it has not been fixed.. Windows Live on PC works fine but uses "plus.mail.yahoo.com" & "plus.smtp.mail.yahoo.com "   I tried this but with or without the plus added it does not work, I just get a different error msg. ..i.e. name password incorrect.
I have seen many people online with this problem, this is a shame because Outlook webmail has a superior GUI than Yahoo and I would hate to have to switch.
PS: I also went to Yahoo mail plus and deleted all spam-mail etc,  but that didn't work either. (test mail came in on PC Windows Live)
Ms.Ginny nyc