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I am running Exchange 2003 sp2 on a Win2003 Server and everything is running okay for the moment but in event viewer i am getting a bunch of 7004 7010 error(s):

Posted on 2007-03-28
Last Modified: 2011-09-20
I am running Exchange 2003 sp2 on a Win2003 Server and everything is running okay for the moment but in event viewer i am getting a bunch of 7004 7010 error(s):

This is an SMTP protocol error log for virtual server ID 1, connection #182. The remote host "", responded to the SMTP command "xexch50" with "504 Need to authenticate first  ". The full command sent was "XEXCH50 2088 2  ".  This will probably cause the connection to fail.

Can anyone assist me with correcting this issue?
Question by:dbosman7
LVL 30

Accepted Solution

LauraEHunterMVP earned 125 total points
ID: 18807975
See if the following KB will assist you in troubleshooting the "need to authenticate first" error:


Hope this helps.

Laura E. Hunter- Microsoft MVP: Windows Server - Networking

Assisted Solution

jasonwilliams74 earned 125 total points
ID: 18807998

This problem occurs when the following conditions are true:
1.The server that is running Exchange Server 2003 has SMTP virtual servers that have a Fully Qualified Domain Name (FQDN) that does not match the server name.
2.The FQDNs for the SMTP virtual servers do not have a Service Principal Name (SPN) registration.

Here is a Microsoft Support article that should help:


Hope that helps.


Author Comment

ID: 18811172
I will try this and see if it works...

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