Email & DNS tools

DKIM Lookup Tool

Check any DKIM selector and read its public key. We pull the TXT record under selector._domainkey, confirm the key is present, and report the key type.

DKIM Record Generator

Turn any public key into the exact DKIM DNS TXT record, with PEM cleanup, truncation warnings and automatic 255-character chunking.

Runs in your browser

DMARC Record Checker

Pull any domain's DMARC record and read the policy, alignment and reporting back in plain terms, with a score that flags a spoofable setup.

DMARC Record Generator

Build a correct DMARC TXT record with policy presets, a staged rollout plan and validation warnings that catch mistakes before DNS does.

Runs in your browser

Email Auth Posture Checker

Grade a domain's SPF, DKIM, DMARC and BIMI into one email authentication posture score, with a prioritised fix list and the worst issues first.

Runs in your browser

Email DNS Health Checker

Check a domain's MX, SPF and DMARC records and score whether it is set up to send and receive mail or quietly broken.

SPF Record Checker

Check a domain SPF TXT record, break down every mechanism, include and IP range, and read the -all, ~all, ?all or +all policy token.

SPF Record Generator

Build a correct SPF TXT record with provider presets and a live DNS lookup counter that warns you before you hit the 10 lookup wall.

Runs in your browser