2.2.1.8 NNTP_NTLM_Not_Supported_Response
If NTLM is not supported, the NNTP server will respond with an NNTP message that is prefixed with a status code of 485 to indicate that NTLM is not supported. The only useful data in this message is the status code of 485. This message is referred to as NNTP_NTLM_Not_Supported_Response in this document.
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485 <human-readable-string><CR><LF>
<human-readable-string> MUST be ignored by the client.