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NOVUS DIAGNOSTIC TOOLS

Check your email authentication records.

Start with a useful check. Understand the result. Decide what to do next.

← All diagnostic tools

DNS questions are sent to Cloudflare’s public resolver and cached for up to five minutes. The certificate check also connects to one public IPv4 address on port 443. Enter a public domain only. Limit: 20 checks per hour per IP address.

For example, example.com. Enter a hostname without https:// or a path.
Find this in your email provider’s DNS setup instructions, for example selector1.

These focused checks are a starting point. They do not certify security, email deliverability, accessibility, or compliance.