Error code "0x800CCC80"

[problem man]

I'm using MS outlook 2003 & 2007 (with latest service pack and patches),
running in Windows XP (with latest service pack and patches), to access
mailbox thru IMAP from non-Microsoft mail server. In the outlook profile,
SMTP authentication is turned ON - Use same settings as my incoming mail
server.

After I enabled "Relay" setting, found that when sending out mails in MS
outlook 2007, it showed error message "reported error (0x800CCC80): "None of
the authentication methods supported by this client are supported by your
server."

But, I didn't have this problem when sending in MS outlook 2003. Please
advise why Outlook 2007 has such problem.

For the workaround, I turned off SMTP authentication in Outlook 2003.
Besides using this method but I want to keep to use "SMTP authentication",
any other workarounds?

Please help.

 

[Roady [MVP]]

Which "relay" function are you referring to?
Is this your own server or hosted by an ISP?
Have you verified your configured ports already?

Do you have a virus scanner installed which integrates itself with Outlook?
Uninstall this integration part of your virus scanner and try again; you'd
still be sufficiently protected by your on-access scanner part of the virus
scanner. For more details see;
http://www.msoutlook.info/question/20

 

[problem man]

The server is in our own site.

To use "Relay" feature, I added our office's ip subnet in the "relay"
settings in the mail server so that the user client e.g. MS outlook doesn't
need to enable smtp authentication to send out mails. The problem only occurs
in MS outlook 2007 when smtp authentication is turned on. I did the testing
in a clean PC without anti-virus and anti-spam software installed.

Any idea why Outlook 2007 has this behavior? And, how to fix it (I want to
keep "smtp authentication" ON)?

Thanks.