DKIM
DomainKeys Identified Mail: a digital signature added to outgoing email that proves it was not altered in transit and genuinely came from the domain it claims to. The other check DMARC relies on. See DKIM | Guidelines.
DomainKeys Identified Mail: a digital signature added to outgoing email that proves it was not altered in transit and genuinely came from the domain it claims to. The other check DMARC relies on. See DKIM | Guidelines.