We are transferring a couple of domains to Google Domains to try it out.
Before finalizing the transfer, there's a Detect and import my domain's current settings
option.
Google was able to find all our A, MX, CNAME and TXT records.
How is this possible? Is there a mechanism in place to do zone transfers between registrars? I know you can't get the records via normal DNS queries.
Best Answer
@ceejayoz is right; they just do lookups for common DNS records including Google Apps records which we have.
Found some documentation on this: