Cold Email Domain Grader
One input, the full picture: SPF, DKIM, DMARC, MX and blacklist status for any sending domain — graded A to F the way inbox providers see it.
What the grade means
- A — authentication fully configured; keep monitoring for drift.
- B — solid foundation with warnings worth fixing (weak DMARC policy, near-limit SPF).
- C–D — at least one broken or missing pillar; expect degraded inbox placement.
- F — actively harming deliverability: missing auth or blacklist listings.
The grade weighs SPF validity and lookup count, DMARC presence and policy strength, DKIM key discovery and length, MX presence, and listings across 10 DNS blacklists.
A grade is a snapshot. Deliverability is a moving target.
Records drift, keys rotate, blacklists update hourly. Aurelius re-grades your domains every day and alerts on any regression. Free for 2 domains.
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Deep-dive tools: SPF Checker · DMARC Checker · DKIM Checker · Blacklist Checker · DMARC Report Analyzer