What is DKIM?
The full form of DKIM is domain keys identified mail. It is a technique that helps a receiver authenticate the sender’s email address.
Each email has a signature that is assigned to the message. It is then secured with encryption. This signature is usually not viewable to end-users or the customers that receive your email.
The validation of the sender’s address is done at a server level.
How does this help?
The authentication that DKIM provides helps establish the reliability of your emails. This helps ensure that your email does not end up in the spam folder.