Email Tools

Paste email headers and see a human-readable breakdown of authentication results, routing hops, and spam indicators.

Recursively resolve your SPF record, count DNS lookups against the 10-lookup limit, and get a flattened record.

Check if a domain has a BIMI record and preview how the brand logo appears in email inboxes.

Look up and validate a DKIM public key record. Check key type, length, algorithm, and testing flags.

Build a DMARC TXT record with an interactive wizard. Set policy, reporting, alignment, and more.

Select your email providers and get a ready-to-paste SPF record with live DNS lookup counting.

Get a step-by-step plan to move from p=none to p=reject based on your current email authentication state.

Check if your domain or IP is listed on 50+ real-time blacklists (DNSBLs) with direct delist links.

Check if a domain has MTA-STS configured to prevent email interception in transit.

Check if your DNS records have propagated across Cloudflare, Google, Quad9, and OpenDNS resolvers.

Upload a DMARC aggregate report XML and see who's sending as your domain, with pass rates and action items.