Recipient filtering at the front door - i.e. do not accept a message for a non-existent address. Once you accept a message for delivery you are technically obligated to either deliver or notify the sender of the failure.
________________________________ From: Tu, Kevin [mailto:k...@ccscorporation.ca] Sent: Wednesday, July 28, 2010 12:55 PM To: MS-Exchange Admin Issues Subject: Exchange 2007 Failure DSNs Hello, It seems our Exchange server is bouncing DSNs (or Non-Delivery Notifications) to SPAM like emails. For example, if an email sent to an email address which does not exist, the Exchange server will bounce an Undeliverable notification to sender's address. Is this a concern and how to fix it safely? Thanks, This email and any files transmitted with it are solely intended for the use of the addressee(s) and may contain information that is confidential and privileged. If you receive this email in error, please advise us by return email immediately. Please also disregard the contents of the email, delete it and destroy any copies immediately. CCS Corporation and its subsidiaries do not accept liability for the views expressed in the email or for the consequences of any malicious code that may be transmitted with this email. This email is also subject to copyright. No part of it should be reproduced, adapted or transmitted without the written consent of the copyright owner. CCS-06-01-2009
