What does it mean or what do I need to check for: This is an SMTP protocol error log for virtual server ID 1, connection #6

Posted on 2008-10-20
Medium Priority
Last Modified: 2012-05-05
I will just copy and paste a copy of the error message
Event Type:      Error
Event Source:      MSExchangeTransport
Event Category:      SMTP Protocol
Event ID:      7004
Date:            10/19/2008
Time:            7:25:43 PM
User:            N/A
Computer:      SERVER1
This is an SMTP protocol error log for virtual server ID 1, connection #6. The remote host "", responded to the SMTP command "xexch50" with "504 Need to authenticate first  ". The full command sent was "XEXCH50 2384 2  ".  This will probably cause the connection to fail.

Thanks for any help

Question by:lwalker47
LVL 15

Accepted Solution

tenaj-207 earned 1500 total points
ID: 22759295

I've never seen this error before but I've found some good information on it.


It basically says that the error is from a firewall rejecting the email for unknown reasons.  the xsxch50 is  a command used to communicate between exchange servers.  So unless you have multiple exchange servers you don't even need it.

Let me know if this helps.
LVL 33

Expert Comment

ID: 22759516
REduce the logging enabled on MSExchange Transport. If Mail flow isn't affected please ignore such events, such sort of events cause heart ache's when transport logging is maximised.

Author Closing Comment

ID: 31507852
Why did this message just start showing up?  I never saw it for 18 months.  Now I get 10 of these messages a day... I have followed your solution so we will see if everything works

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