This is serious. This is about your email deliverability. I know from my own experience that these acronyms may sound unfamiliar, scary and may seem totally uninteresting. Or maybe they sound familiar, but you never cared enough to check what they really are. Either way, it’s time to learn a bit about what SPF, DKIM and DMARC are and how to set them up in your DNS records for your mail server, if you want to have better control over your email deliverability.