I am having an issue with spoofing...I'm running a 200 Exchange server & Symantec Mail Security for SMTP ver 4. I have a user named John Smith which is constantly having a spoofing problems, I have attached the last email that was rejected, the issue is this user never sent this message. What is the best method to eliminate this. Thanx in advance. This individual is the head of the department so I need a resolution like yesterday so the points are high.
From: System Administrator
Sent: Sunday, June 03, 2007 11:05 PM
To: John Smith
Subject: Undeliverable: Lovers package at discount price+ACE-
Your message did not reach some or all of the intended recipients.
Subject: Lovers package at discount price!
Sent: 6/3/2007 11:03 PM
The following recipient(s) cannot be reached:
email@example.com on 6/3/2007 11:03 PM
The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.