A DKIM record, or DomainKeys Identified Mail record, is a type of DNS (Domain Name System) record used to enhance email security by allowing a sender to digitally sign their outgoing emails. This digital signature is added to the email header using cryptographic techniques.

When an email is received, the recipient’s email server can verify the DKIM signature by retrieving the public key from the DKIM record in the sender’s domain’s DNS. If the signature is valid, it indicates that the email has not been altered during transit and that it originated from an authorized sender associated with the domain. DKIM helps prevent email spoofing and ensures the authenticity and integrity of email messages.

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