I can't add a CNAME to another domain - why and how can I fix?
My zone name is myapp.com. To add automated email security re spam, SendGrid (provider) wants me to add 3 CNAME records of the format:
- mail.myapp.com a123.b456.sendgrid.net - s1._domainkey.myapp.com s1.domainkey.a123.b456.sendgrid.net - s2._domainkey.myapp.com s2.domainkey.a123.b456.sendgrid.net
I can't do this. There is no error, the create button just does not work. I can however create CNAME records to my own domain.
Am I breaking the DNS rules or is this a Google Cloud limitation??
EDIT: Screen shot added.
Redacted parts are all myapp.com except the last two which is the SendGrid code. "Respond" is my subdomain. The existing CNAME is just a test to show I can add CNAMEs.