Hi. I've created a subdomain to hold extra email accounts (when I say "extra" I mean that our main email server is GMail, but we have a bunch of extra people for whom we don't want to have / pay a GSuite license, so we'll be hosting those accounts at the hub).

Additionally, our DNS servers are hosted by DYN.com.

We'd like to know how to enable and set up the domain keys for this scenario, i.e. a subdomain of interaxa.com and DNS hosted externally.

Thank you!

Fernando