Hi all I have an exchange server that repeatedly gets 7004 errors in the event viewer. The description is as follows:[code]This is an SMTP protocol error log for virtual server ID 1, connection #1116. The remote host "208.180.40.82", responded to the SMTP command "rcpt" with "550 relaying mail to vaxc.cc.monash.edu.au is not allowed ". The full command sent was "RCPT TO:<|01k9d7ydymyoaausg1@vaxc.cc.monash.edu.au> ". This will probably cause the connection to fail.[/code]In each event idthe email address is a different obscure address. Is the server being used to relay spam? If so how do I prevent this?Any advice would be greatly appreciated!

Hello, Which version of Exchange do you use? For 2003/2000 check below KB and verify & correct the open relay and settings that sends unsolicited commercial e-mail as per KB. How to troubleshoot mail relay issues in Exchange Server 2003 and in Exchange 2000 Server http://support.microsoft.com/kb/895853

Hi, For Exchange 2007, please ensure the Anonymous User group does not have ms-Exch-SMTP-Accept-Any-Recipient permission on the Receive Connector which used to receive Internet email. For relay setting for Exchange 2007, you can refer to following article: http://msexchangeteam.com/archive/2006/12/28/432013.aspx Mike

Hello, thanks for helping me. I do use exchange 2003. I have looked through the article but I could not find anything out of order. It is not set to relay mail, and there are no event 1708 in the log. Any ideas?I appreciate your time

Hi, I think the message only indicated when attempting to telnet to remote host 208.180.40.82 and send email to |01k9d7ydymyoaausg1@vaxc.cc.monash.edu.au, the remote host reject the email as unable to relay the email. Base on the current situation, I suggest you enable the Message Tracking on the Exchange Server to check where the message is received. Whether it is received from external host or submitted by internal user? Mike

Mike,I will enable that and see if it is internal or external.Thanks so much!