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Sending' reported error (0x800CCC80) : 'None of the authentication methods supported by this client are supported by your server.'

Hi folks,

I can't seem to fix the following issue:

Im stuck now in Outlook with an error of :

Task - xxUserxx - Sending' reported error (0x800CCC80) : 'None of the authentication methods supported by this client are supported by your server.'

I dont know which authentication method to use on the server and I suspect this is the root cause...

How do i setup authentication for this client - I suspect this will resolve the issue?

Thanks,
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Oh, and one more thing... if sending or recieveing mails fails all of a sudden, but did work in the past the reason may be that a plugin from Outlook is interfering with the mail exchange. This can be something as simple as a bug in a mail spam protection software, and something as serious as malware trying to send out mails undetected.

Better watch out!
This seems to be just badly written error message by MS.  

We solved it by fixing a simple authentication problem - typo in outgoing mail server name - which should have just produced an "authentication failed" message.  

Instead it gave this weird message!

Double check all the authentication settings for the account;