Alternatives to MXToolbox DKIM Lookup

A free web tool that tests whether a domain publishes a valid DKIM public key for a selector. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as MXToolbox DKIM Lookup.

  • EasyDMARC DKIM Lookup

    A free web tool that looks up and validates a domain's DKIM record for a given selector.

    FreeProprietaryWeb

    EasyDMARC DKIM Lookup checks a record by domain and selector and can detect selectors automatically, so you need not know the selector beforehand.

  • Maileroo Mail Tester

    A free web tool that grades a test email for authentication, spam score, DNS and blacklists.

    FreeProprietaryWeb

    Maileroo Mail Tester shows every DKIM signature on a real delivered message, testing actual signing rather than only the published key.

  • MXToolbox

    A web-based suite of DNS, MX, SPF, DMARC and blacklist lookups for diagnosing email delivery.

    FreemiumProprietaryWeb

    MXToolbox's wider suite runs the same DKIM check alongside MX, SPF, DMARC and blacklist lookups, with prompts for its paid service.

  • GlockApps

    An online email deliverability tester that checks inbox placement, spam scores, blocklists and domain authentication.

    FreemiumProprietaryWeb

    GlockApps checks DKIM together with SPF, DMARC, blocklists and inbox placement, aimed at bulk senders, with full testing on a paid plan.

  • LearnDMARC

    An interactive web console that visualizes how SPF, DKIM and DMARC evaluate a real email.

    FreeProprietaryWeb

    LearnDMARC evaluates DKIM on a real email you send and visualizes how it combines with SPF and DMARC, rather than only reading the published key.

Similar software

Related functionality, not a direct replacement.