We are running Exchange 2003. Certain hosts sending mail to us will always cause this event. The odd thing is that the email from some of these hosts always gets through and the email from some of these hosts never gets through. I have read the article "How to troubleshoot the "504 need to authenticate first" SMTP protocol error". I have read everything I can find on this forum that is related but I can't find anything that's helpful. If all the messages were getting through, I wouldn't worry about it but since some are not, I need to resolve it.
Update: I have done the Exch50AuthCheckEnabled suggestion. This "appears" to have eliminated the 7010 events. I am still getting 7004 events from certain hosts and am not receiving email from them. The odd thing about this is the other host is sending us and email. Why is my server sending the xexch50 command and why is the other server responding with 504 need to authenticate first when they are sending email to us? "Doug P" wrote: > We are running Exchange 2003. Certain hosts sending mail to us will always > cause this event. The odd thing is that the email from some of these hosts > always gets through and the email from some of these hosts never gets > through. I have read the article "How to troubleshoot the "504 need to > authenticate first" SMTP > protocol error". I have read everything I can find on this forum that is > related but I can't find anything that's helpful. If all the messages were > getting through, I wouldn't worry about it but since some are not, I need to > resolve it. >
