Free tools

Deliverability tools, free and no signup

Check the records that decide whether your mail is trusted before you send a single sequence.

SPF Record Checker

Look up the SPF record on any domain and check it authorises the servers you send from.

Verify the DKIM public key published on a selector and confirm your signing is set up correctly.

Inspect a domain's DMARC policy, alignment mode and reporting addresses.

See which mail servers accept mail for a domain and in what priority order.

Check a domain or IP against major DNS blacklists used by mailbox providers.

Validate syntax, domain and mailbox existence before a send to keep bounce rates low.