Checks for resource record sets that can benefit from having a lower time-to-live (TTL) value. Presently checking for a threshold of 600 seconds. TTL is the number of seconds that a resource record set is cached by DNS resolvers.

Checks for an SPF resource record set for each MX resource record set. An SPF (sender policy framework) record publishes a list of servers that are authorized to send email for your domain, which helps reduce spam by detecting and stopping email address spoofing.

Send report of route 53 domains if privacy protection is not enabled for them. Enabling the Privacy Protection feature would protect against receiving spam and from anyone that might send WHOIS queries to get the contact information that you provided when you registered the domain

To determine if AWS Route 53 is used as DNS service for your domain names. AWS Route 53 DNS service is in use for highly efficient DNS management.