Update 12/11/13 5:00 pm PST
Most affected users should now be able to access their Yahoo Mail accounts on the web and our apps for iOS, Android and Windows 8. Most users should be able to log into their accounts, and send and receive messages. We're continuing to restore access for all affected users.
You'll notice that your most recent messages may not be appearing in your Inbox. We're starting to deliver emails that were sent to you during the outage. Because we have a backlog, it may take us a bit of time but rest assured we're trying to deliver them as fast as we can.
For some of you, emails between 11/25 and 12/9 may not be showing up in your Inbox — we're still working on bringing all accounts up to date. We're also working on restoring IMAP and POP access for those of you accessing your email through a non-Yahoo app (such as Outlook, Apple Mail, or the native mail app on your phone).