We recommend our users to enable SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) records for your domain. SPF allows a domain owner to add a file or record on the server that the recipient server cross-checks and DKIM embed information within the email, making it harder to forge. We have provided steps to enable on cPanel.
Login to cPanel > Email and click on Email Deliverability or menu
Click on manage Button.
Now you can manage DKIM and SPF here,
NOTE: If you are using Cloudflare, copy the code and update on Cloudflare.
And Done, refresh the page after some time.