DNS deliverability checks in Regal Send
Updated September 23, 2026
DNS deliverability checks in Regal Send inspect the From Email domain without sending an email. The results distinguish a verified record from a record that merely exists.
Run DNS deliverability checks#
- Open Regal Send > Settings.
- Confirm the From Email is set to the domain you want to check.
- Enter the DKIM selector supplied by the active email provider, such as selector1. You can also paste the full DKIM hostname, such as selector1._domainkey.example.com.
- Select Save and run checks now.
- Review the SPF, DKIM and DMARC result cards and any displayed record values.
Understand the result icons#
- A green tick means Regal Send could validate the required structure and, where supported, match the active provider.
- An amber information result means a record exists but exact provider correctness cannot be proved automatically. Compare the displayed value with the current value in the provider account.
- An amber warning means the record is missing, duplicated or structurally invalid.
- An awaiting result means a sender domain, DKIM selector or enhanced check is not yet available.
What Regal Send validates#
SPF#
Regal Send checks that there is one SPF record, validates its basic structure and terminating policy, and directly matches known sender values for Microsoft 365, Google Workspace and Elastic Email. Indirect or custom SMTP authorisation is shown for administrator review. See the official Microsoft SPF guidance, Google SPF guidance or Elastic Email domain guidance.
DMARC#
Regal Send checks that one DMARC record exists, starts with DMARC version 1 and contains a supported policy of none, quarantine or reject.
DKIM#
Regal Send accepts either the selector alone or the full DKIM hostname, then saves the selector-only value. For Microsoft 365, a structurally valid CNAME target ending in the recognised Microsoft DKIM domain is shown with a green verified tick. Other structurally valid DKIM records remain an administrator-review result because Regal Send cannot prove that the public value is the current value supplied by that provider. Compare any displayed review value with the provider account. See the official Microsoft DKIM guidance.
Important limitations#
DNS records can take time to propagate. These checks do not send a message, verify inbox placement or replace authentication results from a received email header. A connected mailer can also need attention independently of valid DNS records.
