Search for "Google Postmaster tools" or check out https://postmaster.google.com/managedomains https://postmaster.google.com/managedomains You don't have to re

Search for "Google Postmaster tools" or check out https://postmaster.google.com/managedomains https://postmaster.google.com/managedomains You don't have to register per-se, but you get access to reports for your domain so you can see any potential trouble.