Configure the Approved IP Address list
Configure the Blocked IP Address list
Configure the Approved Country/Region list
Configure the Blocked Country/Region list
The Approved IP Address and Blocked IP Address lists support both IP addresses and Classless Inter-Domain Routing (CIDR) blocks.
To add a CIDR block to the list, type the IPv4 address / CIDR block. The following is the only valid format: x.x.x.x/z
The IP addresses in the approved lists bypass other IP reputation-based filtering as well as reverse DNS validation. This list is useful for ensuring all messages from a partner company or other MTA are allowed, no matter their status with the standard IP reputation databases or with the Trend Micro Email Reputation Services (ERS) dynamic IP reputation database. When using the IP reputation approved lists, you may experience lower overall spam catch rates.
The IP addresses in the blocked lists are not subject to other IP reputation-based filtering. Trend Micro Email Security permanently rejects connection attempts from such IP addresses by responding with a 550 error (a rejection of the requested connection).