What is a DKIM signature?
DKIM stands for DomainKeys Identified Mail. It is an email authentication method that provides integrity and non-repudiation by using a digital signature that identifies the sending domain.
How does a DKIM signature work?
DKIM signatures work by inserting a digital signature into the header of an email. This signature can be verified by the receiving server and used to determine whether or not an email has been tampered with during transit.
DKIM uses public-key cryptography, which relies on a pair of keys: one private and one public. The public key is distributed to anyone who wants it, and the private key is kept secret.
Add a DKIM record
To add a DKIM signature, login to the mail panel (panel.usaboxmail.com) then, select the domain name that you want to set the DKIM signature for and select the Settings tab. Go to the Security section and scroll to the Custom DKIM Signature section. Click on the Activate DKIM button, then follow the instructions to create the signature.
IMPORTANT: Please ensure that your SPF record is correctly setup in your DNS before activating your DKIM signature on your domain.