Set up DKIM for Google Workspace
Apps → Google Workspace → Gmail → Authenticate email
- Sign in to the Google Admin console as a super administrator.
- Open Apps → Google Workspace → Gmail → Authenticate email.
- Choose the domain, then Generate new record with a 2048-bit key length.
- Copy the generated TXT value and publish it at google._domainkey on your domain.
- Wait for DNS to propagate, then click Start authentication.
Confirm it worked
DNS changes take time to propagate. Check the record once you have published it.
Google Workspace official documentation