DKIM and Domain Keys class for PHP Icon

DKIM and Domain Keys class for PHP

An easy-to use standalone PHP class to sign mails with DKIM and DK

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The project has moved to GitHub and will not be updated here anymore :

This class is a spin-off of PHPMailer, basically I took only what was necessary for DKIM and improved as much as I could, including with a couple fixes, multiple canonicalization options and the support of Domain Keys. It should be easy as pie to use, check the test file.

DKIM and Domain Keys class for PHP Web Site



  • is a standalone DKIM class
  • supports UTF-8 (although you'd better base64 encode)
  • will let you choose the headers you want to base the signature on
  • will let you choose between simple and relaxed body canonicalization
  • supports Domain Keys (see limitation in the file)
  • will let you choose Simple or Nofws DK canonicalization
  • fixed a couple PHPMailer loose-ends in canonicalization to follow more strictly the RFC and avoid failures
  • removed unnecessary code for l and z parameters
  • cleaner and more understandable code than elsewhere (IMHO)


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