How to Specify Sender ID Filtering Options


Topic Last Modified: 2007-01-29

Sender ID filtering allows you to specify how the server should handle messages that failed Sender ID verification. Sender ID filtering is an industry standard that you can use to provide more protection against UCE and phishing schemes.

Sender ID filtering is defined globally, but enabled at the SMTP virtual server on a per-IP address basis.

You can enable Sender ID filtering behind the perimeter of the network. To do this, you specify the IP addresses of the servers in your internal network that you want excluded from Sender ID filtering. For information about how to enable Sender ID filtering behind the perimeter, see How to Specify IP Address Configuration Data for Sender ID Filtering.

  1. Start System Manager: On the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.

  2. Double-click Global Settings.

  3. Right-click Message Delivery, and then click Properties.

  4. Click the Sender ID Filtering tab.

  5. Under If ID validation fails, take the following action, specify the action you want Exchange Server to take when Send ID verification fails.

  6. Select Accept (the Sender ID status will be attached to the message for additional anti-spam processing) if you want the Sender ID filter to stamp the validation results to the message and be processed by additional anti-spam processing, such as intelligent message filtering. This is the default option.

  7. Select Delete (the message will be accepted and then deleted; no NDR will be sent back to the sender) if you want the Sender ID filter to accept the mail and then delete it without sending the non-delivery report (NDR) to the user.

  8. Select Reject (the message will not be accepted. The sending party will be responsible for NDR generation) if you want the Sender ID filter to reject the mail on the SMTP protocol level and issue an NDR message to the user. Specifically, the sending server is responsible for generating an NDR.

After you configure these options, you must enable Send ID filtering on your SMTP servers.