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What is DKIM (DomainKeys Identified Mail)?

Quick Answer

An email authentication protocol that lets receiving servers verify that an email was sent by the domain it claims to be from.

DKIM adds a digital signature to every email header using public-key cryptography. The sending server signs with a private key; the receiving server verifies using a public key published in DNS (TXT record). DKIM prevents email spoofing and improves deliverability. MisarMail automatically configures DKIM for your sending domains.

Related Terms

DMARC (Domain-based Message Authentication)

An email authentication policy that tells receiving servers what to do with emails that fail DKIM or SPF checks.

SPF (Sender Policy Framework)

A DNS record that specifies which mail servers are authorized to send email on behalf of your domain.

Email Deliverability

The percentage of emails that reach the recipient's inbox rather than the spam folder or being bounced.

Sender Reputation

A score assigned by mailbox providers based on your sending patterns, determining whether your emails reach the inbox.

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