Sender Policy Frame(SPF) record indicates which mail server is authorized to send mail for a domain. SPF record is an effective and simple method which lets you avoid spam issues.

Domain Keys Identified Mail (DKIM) is another method of e-mail authentication. This method uses information about domain which is published by the domain owner. That information allows the receiving server to verify if the e-mail message was sent by an authorized owner of that domain name. 

To enable SPF and DKIM:

1) Login to your cPanel account.

2) Scroll down and select the ‘Authentication icon’ from the section "E-mail".

3) Here you can see the options to enable SPF and DKIM records. Click "Enable" and the records will be added to the DNS zone.

 

 
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