Did you recreate the account? Reset the account settings? (change the
settings, apply, change them back) Try Help, office dialogistic?

--
Diane Poremsky [MVP - Outlook]
Author, Teach Yourself Outlook 2003 in 24 Hours
Coauthor, OneNote 2003 for Windows (Visual QuickStart Guide)
Need Help with Common Tasks? http://www.outlook-tips.net/beginner/
Outlook 2007: http://www.slipstick.com/outlook/ol2007/

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"Wayne Abruzzo" wrote in message
...
The Outlook 2007 Beta 2 client is giving the 0x800CCC80 "None of the
authentication methods supported by this client are supported by your
server" error message when sending for an IMAP configuration running on
Windows Vista Beta 2. Is there an enhanced security setting I am missing
with the Outlook 2007 client or perhaps with Windows Vista that is
preventing messages from being sent?

ADDITIONAL INFO: Residential high speed Internet via Cox cable requires
the use of their SMTP server for all outgoing SMTP traffic so I use my
incoming IMAP server and Cox's outgoing SMTP server. I specify the
appropriate credentials for my incoming IMAP server and the appropriate
credentials on the Outgoing Server tab for the Cox SMTP server. I've
Google'd the error code and didn't get anything useful.

The identical configuration works perfectly under Windows XP / Outlook XP
(2002) and with Windows Vista / Windows Mail (default email client in
Vista). I've configured the email account slowly several times in Outlook
2007 to make sure I was not typing any of the info incorrectly. It seems
to be a security "feature" or other setting in Outlook 2007 or Windows
Vista that is preventing the connection/authentication. Or perhaps the
Cox SMTP server does not recognize commands coming from these Beta
products.

Thanks for your input and suggestions.

Wayne