To create an SPF record for a domain:

1. Log in to the Cpanel for your domain.

2. Locate the page from which you can update the DNS records.
  1.        You may need to enable advanced settings.

3. Create a TXT record containing this highlighted text: v=spf1 include:_spf.google.com ~all

4. Save your changes.
  1.        Keep in mind that changes to DNS records may take up to 48 hours to propagate throughout the Internet.

Note: 

Multiple SPF records are not recommended and may cause delivery and spam classification issues..