The first page: https://toolbox.googleapps.com/apps/checkmx/ runs a check of my domain. Ran check with these 3 results:
DKIM is not setup
DMARC is not setup
There should be a valid SPF record.
For DKIM: Followed these steps: https://support.google.com/a/answer/174126?hl=en&ref_topic=2752442 and generated the TXT record value. The highlighted result reads:
DNS Host name (TXT Record name): google._domainkey
(and then): TXT record value: and a long string of letters and numbers.
Then: START AUTHENTICATION button results in this alert:
Email authentication was not verified. Please allow 48 hours for DNS to update and make sure you entered the correct TXT record into your domain provider's DNS settings page. [End of Alert].
This seems to suggest that I need to update the DKIM TXT record value on the domain registrar site, which I show as sonic.net. Please advise. Much appreciate your help.