RE: blocking spam ndr's that aren't sent by user
- From: v-robmen@xxxxxxxxxxxxxxxxxxxx ("Robbin Meng [MSFT]")
- Date: Fri, 01 Aug 2008 03:41:03 GMT
Hi Ted,
Thank you for the response and clarification.
Yes, if the issue only occur to certain users and not always occurs, I
believe it is not a Open Relay issue but email address spoofing. Here I
have listed some related article tell you the Anti-Spam Enhancements in
Exchange Server 2003 Service Pack 2 and how to protecting against Address
Spoofing such as configure Sender ID filtering and use IMF SCL to block
spoofing emails.
Protecting Against Address Spoofing - Exchange Server 2003
http://technet.microsoft.com/en-us/library/aa997157.aspx
Anti-Spam Enhancements in Exchange Server 2003 Service Pack 2
http://technet.microsoft.com/en-us/library/aa995992(EXCHG.65).aspx
As for other 3rd party solutions, please go ahead to have a try :-)
Hope this helps.
Best regards,
Robbin Meng(MSFT)
Microsoft CSS Online Newsgroup Support
Get Secure! - www.microsoft.com/security
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