DKIM (DomainKeys Identified Mail) is an email authentication technique that allows the receiver to check that an email was indeed sent and authorized by the owner of the sending domain. It works together with DMARC (and SPF).
In order to implement DKIM you will need to have a valid DKIM record. You can use our DKIM Record Checker to check your DKIM record. A DKIM Record Checker or DKIM Analyzer tool will test the domain name and selector for a valid published DKIM record. DKIM authenticates the reputation and identity of the sender. We strongly recommend you to carefully test any updates to your DKIM records before applying them.