Sender Policy Framework (SPF)
SPF is a form of email authentication that defines a process to validate an email message that has been sent from an authorized mail server in order to detect forgery and to prevent spam. The owner of a domain can identify exactly which mail servers they are able to send from with SPF protocols.
DomainKeys Identified Mail (DKIM)
DKIM is a form of email authentication that allows an organization to claim responsibility for a message in a way that can be validated by the recipient. DKIM uses “public key cryptography” to verify that an email message was sent from an authorized mail server, in order to detect forgery and to prevent delivery of harmful email like spam.
It consists of most important components – SPF and DKIM records setup. In order to enable ones, follow the instructions below
1. Log into cPanel > Email section > Authentication menu.
2. Click on Enable and the records will be added to the DNS zone of all hosted domains automatically.
3. Allow some time to pass for the records to propagate and refresh the page afterwards.
The warnings should go away and DNS checks will be passed.
Also Read: How to Create An Email Forwarder in cPanel?