CRAM-MD5 Authentication Fails with Outlook Express

Question

CRAM-MD5 Authentication Fails with Outlook Express

My Server (10.3.9) is set-up to accept only CRAM-MD5 authentication for IMAP and SMTP. My Macs running Entourage have no trouble authenticating to the mail server via this method.

However, I can't seem to get a PC client running Outlook Express to authenticate. I get the message "CRAM-MD5 authentication failed. None of the authentication methods supported on your IMAP server (if any) are supported on this computer."

Any suggestions?

XServe G5, Mac OS X (10.3.9)

Posted on Jan 14, 2006 7:13 PM

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Answer 1

Best reply

pterobyte

Level 6

11,098 points

Jan 14, 2006 11:56 PM in response to Joel Mcintosh1

Outlook and Outlook Express do not support Cram-MD5. You must enable additional login methods on your server if you wish to cater to those clients.

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Answer 2

Jan 15, 2006 9:36 AM in response to pterobyte

Thanks. That solves that. I looks like I need to implement SSL on the server. That will allow me to "force" everyone to authenticate via SSL, and I can loosen up the authentication level we require on the server. It does look like Outlook supports SSL. Thanks again.

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