As of cPanel & WHM version 62, the system provisions SPF and DKIM for new accounts by default. However, the system does not automatically provision these DNS records for existing accounts. When you enable this feature, the system will create SPF and DKIM DNS records for all accounts and domains. If a domain currently possesses an SPF record, the system will append the appropriate IP address from the /var/cpanel/mainip file to the existing record. However, the system will not modify existing DKIM records.

Do not edit any nameserver configuration files during this process.