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Professional diagnostic operations.. Discover, run diagnostics, and get instant explanations from domain-trained AI experts.

Paste raw email headers to visualize delivery hops, SPF/DKIM/DMARC authentication results, and detect spoofing.

Build a valid SPF TXT DNS record from IP addresses, domains, and includes. Copy-paste ready output.

Create a DMARC DNS record with policy level, reporting addresses, and alignment mode. Prevent email spoofing.

Generate RSA DKIM key pairs and the DNS TXT record for your mail server. Keys generated securely in-browser.

Check if your domain or IP is listed on major spam blacklists (Spamhaus, Barracuda, SORBS, and 50+ others).

Verify MX record propagation across 20+ global DNS servers simultaneously. Diagnose mail routing issues.