What happens if your CNAME isn’t verified?
Unverified CNAME problems:
Tracking failure: ESP cannot track clicks or opens through your domain.
Fallback behavior: ESP uses their shared tracking domain instead. Reputation suffers.
SSL errors: Without proper certificate provisioning, https links fail. Browsers show security warnings.
- Broken links: If CNAME points nowhere or wrong place, links do not work at all.
- Image loading: Open tracking pixels and images may not display.
- Verify CNAME setup before sending. Test links and images in preview mode.
- Unregistered alias causes delivery to fail or default to generic handling.
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