@Paul_Taylor@mathstodon.xyz Running my own email here as well, using my ISP for outbound relay, relying on their reverse-dns and reputation (which has had issues, but it's been good for a couple of years now). Mostly works well, but I've got one user with Outlook client, and i get DMARC reports from Enterprise Outlook *often*. I get spf pass, but dkim fail. Suspect it is on every mail that goes that route. 🧵