Your Yahoo! Mail account is no longer active.
Why is my account inactive?
Yahoo! Mail deactivated your mail account because:
You have not logged into your mail account during the past four months; or
You have requested that Yahoo! Mail deactivate your account.
What does this mean?
All email messages, folders, attachments and preferences have been deleted and cannot be recovered.
All messages sent to
[email protected] are being returned to the sender.
You can still use your Yahoo! ID to access other registered services on Yahoo!.
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OK maybe this is old news...
JUst take it as a reminder for those like myself, I have a few yahoo account & I just find out recently.

IF u have IMPORTANT mails/attactment do back up.