We are using McAfee Securemail 6.7.1 version as our Email Gateway. We replaced Edge Transport server to handle Spam filetering efficiantly. And it’s a good product and we are using since long.
There is requirement to block email from entire subnet and we have to do it in Securemail. To do this we have to follow below steps.
From the admin console: ( GUI)
1.Click the Anti-Spam tab.
2.Navigate to Anti-Spam Advanced, Deny List, Local Deny List.
3.Click Add New.
4.Go to the Add an IP address or subnet field and enter the subnet octets without the trailing dot.
For example, 66.177.104 would block IP addresses 18.104.22.168 – 22.214.171.124.