DKIM Verifier Icon

Verifies DKIM signatures and shows the result in the e-mail header, in order to help spot spoofed emails (which do not come from the domain that they claim to).

Open Source

DKIM Verifier Source Code




DKIM Verifier Extension for Mozilla Thunderbird






13 May 13

Last Updated

10 May 24

Latest version


Primary Language



4,119 KB







Language Usage

Language Usage

Star History

Star History

Recent Commits

  • dodmi (28 Apr 24)

    Favicon and sign rules for (#440) Tracker Software's default mail domain is now, added rules for favicon and signing

  • lieser (18 Jan 24)

    Avoid logged result to change after logging (#422)

  • lieser (11 Jan 24)

    Make enums const

  • lieser (09 Jan 24)

    Extend test for unsigned Reply-To header

  • lieser (09 Jan 24)

    Extend exception type descriptions

  • lieser (08 Jan 24)

    Improve table views by switching to the Tabulator library

  • lieser (15 Nov 23)

    Release version 5.4.0

  • lieser (15 Nov 23)


  • lieser (15 Nov 23)

    Update default rules and favicons

  • lieser (15 Nov 23)

    Options navigation is now flat

  • kenichisak (15 Nov 23)

    Minor adjustments to the Japanese translation for 5.4.0 (#410)

  • lieser (13 Nov 23)

    Update de locales

  • lieser (13 Nov 23)

    Update Node.js and devDependencies

  • lieser (13 Nov 23)

    Update settings

  • lieser (12 Nov 23)

    Update default rules and favicons

  • lieser (12 Nov 23)

    Show DKIM label if "Hide labels column" is enabled

  • dodmi (01 Nov 23)

    Favicon for and rules for Actalis (part of Aruba Corp) (#399)

  • lieser (30 Oct 23)

    Update default rules and favicons (#387)

  • lieser (29 Oct 23)

    Add support for BIMI (#242)

  • lieser (29 Oct 23)

    ARH: don't restrict result keyword for unknown methods

  • lieser (29 Oct 23)

    ARH: allow : in non quoted-string properties if relaxed parsing is enabled

  • lieser (29 Oct 23)

    Libunbound: Fix using a relative path in TB 115 and later (#385)

  • lieser (29 Oct 23)

    Fix missing quote in it translation

  • lieser (29 Oct 23)

    Add missing colons to translations (#396)

  • Mr-Update (29 Oct 23)

    German translation improved (#397) - Improve/fix german translation - Add missing colons (#396)

  • Mr-Update (29 Oct 23)

    Add missing colons to en local (#396)

  • lieser (29 Oct 23)

    Fix verification if a signed header contains a non ASCII character

  • lieser (22 Oct 23)

    Fix support for Conversations add-on in Thunderbird 115 and later (#395)

  • Damian (18 Sept 23)

    Add favicons for important websites operating in Poland. (#393)

  • lieser (18 Sept 23)

    Show proper error message if parsing of a message failed

DKIM Verifier Website


DKIM Verifier :: Add-ons for Thunderbird

Verifies the DKIM-Signature of an e-mail.


Does not redirect

Security Checks

All 66 security checks passed

Server Details

  • IP Address
  • Location San Francisco, California, United States of America, NA
  • ISP CloudFlare Inc.
  • ASN AS13335

Associated Countries

  • US

Saftey Score

Website marked as safe


Blacklist Check was found on 0 blacklists

  • ThreatLog
  • OpenPhish
  • PhishTank
  • Phishing.Database
  • PhishStats
  • URLhaus
  • RPiList Not Serious
  • AntiSocial Blacklist
  • PhishFeed
  • NABP Not Recommended Sites
  • Spam404
  • CRDF
  • Artists Against 419
  • CERT Polska
  • PetScams
  • Suspicious Hosting IP
  • Phishunt
  • CoinBlockerLists
  • MetaMask EthPhishing
  • EtherScamDB
  • EtherAddressLookup
  • ViriBack C2 Tracker
  • Bambenek Consulting
  • Badbitcoin
  • SecureReload Phishing List
  • Fake Website Buster
  • TweetFeed
  • CryptoScamDB
  • StopGunScams
  • ThreatFox
  • PhishFort

Website Preview

DKIM Verifier Reviews

More Email Security Tools

  • Mail client add-on, enabling the use of OpenPGP to easily encrypt, decrypt, verify and sign emails. Free and open source, Enigmail is compatible with Interlink Mail & News and Postbox. Their website contains thorough documentation and quick-start guides, once set up it is extremely convenient to use.

  • Quick tool, that enables you to test whether your mail client "reads" your emails before you've opened them, and also checks what analytics, read-receipts or other tracking data your mail client allows to be sent back to the sender. The system is open source (on GitLab), developed by Mike Cardwell and trusted, but if you do not want to use your real email, creating a second account with the same provider, should yield identical results.

About the Data: DKIM Verifier


You can access DKIM Verifier's data programmatically via our API. Simply make a GET request to:

The REST API is free, no-auth and CORS-enabled. To learn more, view the Swagger Docs or read the API Usage Guide.

About the Data

Beyond the user-submitted YAML you see above, we also augment each listing with additional data dynamically fetched from several sources. To learn more about where the rest of data included in this page comes from, and how it is computed, see the About the Data section of our About page.

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