Have you configured the account correctly?
http://help.yahoo.com/mail/pop/pop-28.html

--
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more

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"Kat" wrote in message
...
I am trying to configure Outlook so that it downloads my Yaho.com e-mail, or
sends messages for that matter.
The message I receive back when trying to send a message is:
Task 'The Richards: Folder:Inbox Synchronizing headers.' reported error
(0x800CCCF4) : 'An unknown error has occurred. Please save any existing work
and restart the program.'

I don't have a clue on how to import my email into Outlook
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Kat