Regal Send delivery health and DNS diagnostics

Updated September 22, 2026

Regal Send delivery health and DNS diagnostics provide a daily, non-delivery check for your active mailer and sender domain. The check does not send an email.

Regal Send delivery health and DNS diagnostics#

Open Regal Send > Settings and review the Delivery health and domain checks card. It shows the most recent result and explains whether action is required.

What the scheduled check does#

  • Checks that the active mailer configuration is valid.
  • For Microsoft 365 and Google, refreshes the OAuth access token when needed. This confirms the saved connection can still be used without sending a test message.
  • Checks SPF and DMARC TXT records for the configured From Email domain.
  • Checks a DKIM TXT record when you enter the selector supplied by your email provider.

Set the DKIM selector#

  1. Find the DKIM selector in your email provider or domain DNS instructions.
  2. Enter only the selector in Regal Send Settings, for example selector1.
  3. Save the settings and wait for the next health check.

Regal Send checks selector._domainkey.your-domain.example. A missing record means you should review your provider DNS instructions. It does not by itself prove inbox placement.

When a warning appears#

An administrator sees a WordPress warning after a health check finds a problem. Open the Settings card, correct the stated configuration or authorisation issue, then use Test Email to confirm message acceptance. SPF, DKIM and DMARC improve sender authentication but do not guarantee inbox delivery.

For Microsoft Graph permissions, see Microsoft Graph permissions reference.

Was this article helpful?

Still need help? Contact support