What can I do here?
Use this window to protect the DNS Server from cache poisoning.
Getting Here - Object Explorer > New > Host > Servers > Mail Server > Protections |
Cache Poisoning occurs when DNS caches receive mapping information that was deliberately altered from a remote name server. The DNS server caches the incorrect information and sends it out as the requested information. As a result, email messages and URL addresses can be redirected and the information sent by a user can be captured and corrupted.
Note - Enforcement of these settings depends on the profile that protects the server.