Yahoo messed up. In introducing their new Yahoo Webmail Beta, they blocked all POP and SMTP access (a.k.a. people using Outlook or other mail clients) to their mail services, until you login via webmail and click thru two screens. This has affected all of their business service clients, dsl clients using pop access, and people who have upgraded their free Yahoo accounts to Premium accounts by paying a small yearly fee.

…nuf said