Sounds like some process on your Exchange server is sending mail as 127.0.0.1 is localhost. That is, that machine. I would check the task manager to what processes are running.
From: Chyka, Robert [mailto:bch...@medaille.edu] Sent: Wednesday, July 29, 2009 11:57 AM To: MS-Exchange Admin Issues Subject: Quick Event Question We are running Exchange 2003 on Windows Server 2003. We are fully patched etc. We are starting to get a slow growing amount of outbound SPAM trying to be sent out of our Exchange server and we are looking to stop it before it gets ugly. We are a verified closed relay host, but I am noticing a weird event for a specific user in the event log. It is EventId 1708 and the Source is MSExchange Transport The text is: SMTP Authentication was performed successfully with client "[127.0.0.1]". The authentication method was "NTLM" and the username was "xxxxxxx" I didn't know if the 127.0.0.1 was an issue? Never saw it before. Thanks!!! ********************************************************************** CONFIDENTIALITY NOTICE: The information transmitted in this message is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy all copies of this document. Thank you. Butler Animal Health Supply **********************************************************************
