The possible policy topic evidence destination not working DNS error types.
Enums
UNSPECIFIED
No value has been specified.
UNKNOWN
The received value is not known in this version.
This is a response-only value.
HOSTNAME_NOT_FOUND
Host name not found in DNS when fetching landing page.
GOOGLE_CRAWLER_DNS_ISSUE
Google internal crawler issue when communicating with DNS. This error doesn't mean the landing page doesn't work. Google will recrawl the landing page.