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Email Deliverability Grader
Enter a sending domain and get an instant A–F grade on its SPF, DMARC, and DKIM authentication — the three records that decide whether your cold email lands in the inbox or the spam folder. We probe the common DKIM selectors live. Read-only DNS; nothing is sent.
We strip any https://, paths, or @ — just give us the domain. We never send mail; this is read-only DNS.
Beacon checks deliverability before every send.
Authentication is just the start. Beacon researches every prospect, drafts with evidence, lints each message for deliverability, and lets a human approve — no sequences, no blasting a domain into the spam folder.
More free tools: SPF / DMARC / MX Checker·Cold Email Grader·ICP Builder