Email deliverability tools

Validate SPF syntax, includes, and the 10-lookup limit.

Build a clean SPF record from your sending services.

Look up DKIM public keys by selector and validate them.

Inspect DMARC policy, alignment, and reporting addresses.

Generate a DMARC record with a safe rollout strategy.

Validate BIMI record, SVG logo, and VMC certificate.

Generate a BIMI TXT record for your logo.

Fetch and validate MTA-STS policy files.

Validate TLS-RPT DNS records and rua endpoints.

Probe STARTTLS, TLS version, ciphers, and cert validity.

Audit CAA records, allowed CAs, wildcard policy, and iodef.

Look up MX records, priorities, and resolved IPs.

Check IPs and domains against 40+ RBLs in one click.

Check DNS propagation across global resolvers.

PTR lookups with forward-confirmed reverse DNS check.

Spot SOA serial drift across global resolvers.

Discover subdomains and identify mail-sending services.

Domain age, registrar, expiry, and nameservers.

Paste raw headers for hop map and auth breakdown.

Score subject and HTML for spam triggers.