✉️ Email Deliverability Checker
Look up a domain's SPF, DKIM, DMARC, MX, MTA-STS and BIMI records — and get a quick configuration score.
About Email Deliverability
Mailbox providers decide whether your mail lands in the inbox or the spam folder largely from three DNS records: SPF (which servers may send for your domain), DKIM (a cryptographic signature proving the message wasn't altered), and DMARC (the policy that ties SPF and DKIM together and tells receivers what to do on failure). This tool reads all of them — plus your MX servers, MTA-STS and BIMI — straight from public DNS, so you can verify your setup before sending a campaign.
DKIM keys live at <selector>._domainkey.<domain>, and the selector name is chosen by whoever set up signing. We probe the common ones (Google, Microsoft, Proton, Zoho, Fastmail, etc.) automatically — if your provider uses a custom selector, type it in the selector box. Records come from Cloudflare DNS-over-HTTPS. To validate an individual address instead, use the Email Validator; to see raw TXT records, use DNS Lookup.