DomainKeys is an e-mail authetication mechanism designed for verifying the identity of an email sender. It is one of cryptographic authentication method to verify sender’s identity and the integrity of email content. It also verify DNS records of domain of an email sender and the message integrity. DomainKeys has implemented standard of Identified Internet Mail to create enhanced protocol called DomainKeys Identified Mail (DKIM)

How it works and mail is identified as spam or legitimate.

Technically DKIM provides a method for validating a domain name identity that is associated with a message through cryptographic authentication. Basically mailservers generate a public and private key pair and sign outgoing messages with the private key and published the public key as part of their DNS record. The public key published by mailservers can be used to confirm that the sender of the email has not been spoofed.

Email without headers can be used as part of the process of identifying spam.

You can install and use DomainKeys on all cPanel server as cPanel has included this feature for email authentication.

Type the following command on server to enable domainkeys.

#/usr/local/cpanel/bin/domain_keys_installer username (username=cPanel account like alan etc.)

So enjoy the emails without spam