Testing SPF, DKIM, and DMARC
If you are interested in a step-by-step implementation of SPF, DKIM, and DMARC, there’s a post for that! It’s on this site as well and it will walk you through the entire process. https://linuxincluded.com/implementing-spf-dkim-and-dmarc/ Changelog 17Nov2017 – Originally posted 25Mar2018 – Added more SPF tests specifically for lookups 19Nov2018 – Clarified some test steps and added a site Before you jump into testing SPF, DKIM, or DMARC, you need to verify where your authoritative DNS nameservers are. The easiest way…