DomainKeys Identified Mail (DKIM)  is a way to validate a domain name identity that is associated with an e-mail address via cryptographic authentication. This means that your clients can verify who is sending them an e-mail and protects you against imposters pretending to send from your e-mail address. 


  1. Log into your Plesk Control Panel https://your-web-site-name:8443/
  2. Go to Websites & Domains > Mail Settings:
    enabling dkim email signing
  3. Tick "Use DKIM spam protection system to sign outgoing email messages"
    enabling dkim email signing
    NOTE: the following Domain Name System (DNS) records will be added to your DNS table:
    _ domainkey.example.com

  4. DKIM has successfully been added. 
    You can test your DKIM at – https://www.mail-tester.com/spf-dkim-check

    Note: You have to type the word "default" into the DKIM Selector.

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