DNS & Domain
Adding and Verifying Multiple Domains in Google Workspace
Quick Answer
Google Workspace supports adding additional domains as either secondary domains (with their own users) or domain aliases (sharing existing users). Each domain must be verified and have its own correct MX, SPF and DKIM records.
Businesses with more than one brand or domain often need mail to work across all of them, but each additional domain brings its own DNS setup requirements - it does not automatically inherit the primary domain's configuration.
Common Causes
- Assuming a secondary domain automatically shares the primary domain's MX or SPF setup.
- Verifying a domain but forgetting to configure its own DKIM record.
- Confusing "domain alias" (shared users) with "secondary domain" (separate users), which behave differently.
Safe Troubleshooting Steps
- Decide whether the new domain needs its own separate users (secondary domain) or should share existing mailboxes (domain alias).
- Verify the new domain independently, the same way the primary domain was verified.
- Add MX records for the new domain pointing to Google Workspace.
- Generate and publish a DKIM record specific to that domain - it is not shared automatically.
What to Verify
- The new domain shows as verified in the Admin console.
- MX and DKIM records exist specifically for the new domain, not just the primary one.
When Professional Help May Be Useful
If you are managing several domains with different DNS hosts, it can help to have someone track the full checklist across all of them so nothing is missed on a less-frequently-used domain.