Email Authentication Crash Course: Wrap-Up
Throughout my previous posts on SPF, DKIM, and DMARC, I gave pieces of advice on what to do and not do. I figured I should write up one final post that lists all of these in a single place. Background bullet points. Email has two “from” addresses. One address is practically invisible; this is the envelope address. The “From” address in the message headers is what people actually see. The envelope and “From” addresses do not need to match....