DKIM

Also: DomainKeys Identified Mail

DomainKeys Identified Mail (DKIM) adds an invisible digital signature to every email your organization sends, think of it as a wax seal on a letter. It lets the receiving server confirm the email really came from your organization and not someone pretending to represent you. Each tool that sends email for you needs its own DKIM setup.

Related Terms

SPF

The list of services allowed to send email from your domain. DKIM proves the message is genuine, SPF proves the sender is allowed.

DMARC

Tells inboxes what to do when an email fails DKIM or SPF, so scammers can't send emails from your organization.