“No Domain Information” Link

Domains that have connected to the Security Management appliances and could not be verified with a double-DNS lookup are automatically grouped into the special domain called “No Domain Information.” You can control how these types of unverified hosts are managed via Sender Verification. For more information about Sender Verification, see the documentation or online help for your Email Security appliance.

You can use the Items Displayed menu to select the number of senders to display in the list.