What is DKIM?
DKIM adds a digital signature to your outgoing email so receivers can confirm it really came from your domain and was not changed.
DKIM stands for DomainKeys Identified Mail. Your email service signs each outgoing message with a private key. You publish the matching public key in your domain's DNS, usually as a TXT or CNAME record the service gives you. The receiving server uses that key to check the signature. If the message was forged or altered on the way, the check fails.
Why it matters for your business: Major inbox providers expect DKIM, and signed mail is more likely to reach the inbox instead of spam.
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