Take a primary domain where DNS is controlled at provider A (e.g. CloudFlare), email is managed through provider B (e.g. Office 365) and the website is hosted on provider C (e.g. cPanel server). We are using domain name example.com We are as using cPanel IP 1.2.3.4 Test SPF at https://www.dmarcanalyzer.com/spf/checker/ Test DKIM at https://easydmarc.com/tools/dkim-lookup (uses…