To add MX, SPF, and DKIM records to your Shopify store, you need to complete the following steps:
1. From your Shopify admin console, navigate to Settings > Domains
2. Click on the domain you want to configure.
3. Click Domain settings > Edit DNS settings.
4. You can get SPF and DKIM, MX records from cPanel > Domains > Zone editor
5. Click Add custom record, then select MX and TXT record type to add the records you got from cPanel
6. Enter the details required for registration, then click Confirm.