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Pytong

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1. User helpdesk performed NTLM authentication in NT domain SERV-CDC, this domain is not valid

2. Failed POP3 login from ---

Any suggestion? ... logs are full of this

[Updated on: Fri, 12 September 2008 10:49]


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sedell

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That looks like the signature of Outlook 2007 connecting. There isn't a fix for that. Microsoft screwed up the authentication on that version, but they consider it a feature, so I doubt it'll get fixed by them. It hasn't yet.

There are two ways around that, but they aren't always an option. The first is to disable NTLM authentication on the server if you aren't using it. That will prevent Outlook 2007 from trying that authentication method. The second is to install one of the Kerio Outlook Connectors and use that setup with Outlook 2007. They respect the SPA setting and don't use NTLM authentication unless it's enabled.

If you're using Outlook 2003 or earlier, make sure 'Log on using secure password authentication (SPA)' is disabled in the email account settings.

Scott
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Pavel Dobry (Kerio)

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There is also third way, which is the best. Check NT Domain setting in the email domain in KMS and use correct NT domain name.

When the user is authenticated to some NT domain using NTLM, KMS can find appropriate email domain and login the user.
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sedell

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Only if the domain provided by the client is a valid one. The domain in his error looks like a machine name, which would indicate the machine isn't a domain member, or that the account is a local account and not part of AD.

Scott
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