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SMTP protocol error

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  • SMTP protocol error

    Anybody know what this means, I keep getting this error on event viewer on my exchange 2003 server.

    Event Type: Error
    Event Source: MSExchangeTransport
    Event Category: SMTP Protocol
    Event ID: 7004
    Date: 7/24/2008
    Time: 5:06:41 PM
    User: N/A
    Computer: CAN-EXCH-01
    This is an SMTP protocol error log for virtual server ID 1, connection #106. The remote host "", responded to the SMTP command "xexch50" with "504 Need to authenticate first ". The full command sent was "XEXCH50 3324 2 ". This will probably cause the connection to fail.

  • #2
    Re: SMTP protocol error

    There can be a number of reasons for this. It could be your exchange server not being advertised correctly in SMTP, it can also be because your server may be an open relay etc. Check your SMTP connector to make sure that its FQDN is correct first.


    • #3
      Re: SMTP protocol error

      The FQDN on the SMTP connector has the

      Should it have the server's FQDN,


      • #4
        Re: SMTP protocol error

        this is because exchange only allows xexch50 protocol data with authentication.

        take a look at these:
        Last edited by wiredteknologies; 25th July 2008, 21:46.
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