Alternatives to DKIM Validator

Web tool that checks DKIM, SPF and SpamAssassin results for a test email you send. The listings below can replace it for an important use case. Each note says what changes if you switch.

  • DKIM Validator

    Web tool that checks DKIM, SPF and SpamAssassin results for a test email you send.

    FreeProprietaryWeb

Replacements

Listings that take over the same core job as DKIM Validator.

  • Maileroo Mail Tester

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

    FreeProprietaryWeb

    Maileroo Mail Tester also grades a real sent message, adding blacklist, BIMI and MTA-STS checks and suggested DNS records, while promoting Maileroo's sending service.

  • Mail Tester

    A web tool that scores how likely an email is to be marked as spam.

    FreeProprietaryWeb

    Mail Tester scores a single sent email out of 10 for spam likelihood and offers an API, with less detail on what each check covers.

  • LearnDMARC

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

    FreeProprietaryWeb

    LearnDMARC tests a real message and visually explains SPF, DKIM and DMARC alignment step by step, but needs a desktop screen for the full view.

  • GlockApps

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

    FreemiumProprietaryWeb

    GlockApps adds inbox placement across major providers, blocklists and spam scores to SPF, DKIM and DMARC checks, with full seed tests on a paid plan.

  • Postmark Spam Check

    A free web tool and JSON API that returns the SpamAssassin score of an email message.

    FreeProprietaryWeb

    Postmark Spam Check returns only a SpamAssassin score through a web page or JSON API, without DKIM or SPF results.

Similar software

Related functionality, not a direct replacement.