At my last job I was tasked with launching a newsletter, and was suddenly faced with a bunch of unfamiliar acronyms: DKIM, DMARC, SPF. (Apparently that last one is not related to sun protection?)

So I texted Al Iverson (not the basketball player), who’s been working in email deliverability since the dawn of mainstream internet, and asked if he could help me figure out what I really needed to know.