DKIM (Domain Keys Identified Mail) is a method used by recipient servers to determine if an email is spoofed. It acts as a digital "signature" that can be authenticated using a public domain record. The DKIM key in your email indicates that you are indeed the person who sent it. If you are using an email address linked to your domain, (such as This email address is being protected from spambots. You need JavaScript enabled to view it.) you will need to set up DKIM if you wish to use it.