Creating MX record in Google cloud DNS
Solution 1:
You need to prefix the FQDN with the priority:
For what it's worth, it actually says this in the help button right above the field:
A number and DNS name of a mail exchange server, indicating priority of the server. Servers with lower numbers are tried first.
Solution 2:
For all of those that are getting errors after adding the first one. You must add all MX records at once by using the 'Add-item'. Otherwise, you will have errors.
