See how DMARC, SPF, and DKIM work interactively
That's excellent!I tried it with all three of my domains.It's interesting that two of them didn't have full DKIM/DMARC support, even though they are paid mail services.I'll have to check, and see if there is anything that I can do.I seldom have issues with bounces or spam-suckers, but I have had a couple, with those domains.My mac.com domain was green, all the way.