To add or modify a blocked sender:
From the Blocked List screen, do one of the following:
To add a new blocked sender, click Add.
To modify an existing blocked sender, click its domain in the list. The edit screen appears.
To enable the blocked sender, which instructs InterScan™ Messaging Security Appliance (IMSA) to immediately block email traffic from the sender, select the check box next to Enable.
Click either the Domain or IP address radio button, and then type the blocked sender domain or IP address.
Next to Action, select one of the following:
Block temporarily—Block email messages from the IP address and allow the upstream MTA to try again.
Block permanently—Never allow another email message from the IP address and do not allow the upstream MTA to try again.
Click Save. The Blocked List screen appears.
See also: