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What is DKIM (DomainKeys Identified Mail)?

What is DKIM and why it is so important?

๐Ÿ”Ž What is DKIM?

DKIM is an email authentication method, using digital signature attached to the header of email. In a nutshell, when DKIM is published in the DNS records of a domain, it will display a public key that recipient servers can match with the encrypted key in the signature.

It allows:

  • The receiver to check if an incoming email is authentic (i.e. hasn't been modified by any third party since being sent).
  • The receiver to verify that the email has been sent from an address associated with the right sending domain.

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๐Ÿ’ก Why it is so important?

DKIM, along with DMARC and SPF have been created to prevent spoofed emails, spam, or other any malicious emails; by verifying email authenticity to improve online safety.

As for any email security protocols, having a DKIM properly set improves the deliverability of emails sent from this domain.

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๐Ÿ“น Video explanation

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