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.

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.

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.