There is no way to import a huge number of IP addresses into the Blocked List of Sender Filtering settings in InterScan Messaging Security Virtual Appliance (IMSVA). Know the workaround for this functionality.
An Import button is not available in Sender Filtering > Blocked List. As an alternative, you can add individual IP address or IP address range.
- On the IMSVA console, go to Sender Filtering > Blocked List.
Click the Add button.
- Input the IP address or IP address range.
If you would like to suggest the Import option in Sender Filtering, submit a feature request in the Ideas Exchange.