I've also hosted my own email for several years now, on several domains. The one thing I have that does not appear to be listed is a DMARC policy. As the commen

I've also hosted my own email for several years now, on several domains. The one thing I have that does not appear to be listed is a DMARC policy. As the comments on the blog post suggest, configuring DMARC works. I have no problem delivering to either Gmail or Outlook. I don't think it's unreasonable to be strict regarding DMARC delivery. My MTA has a fairly strict SPF configuration - any email with an invalid spf result is rejected. This can come about because a legitimate company has misconfigured their spf records (happened twice in all the years I have hosted, discussions via postmaster@ helped them configure their dns correctly), but 99.999% of the time it is a spammer. What is worse is that rejecting email for domains without any SPF records can still result in valid email being lost, in 2019. In this specific case, I don't think Google are "being evil". They're trying to reduce spam in the email ecosystem and they're doing it by using standards they themselves adhere to (Gmail send me reports of dmarc statistics each day google domains receive email from my box). On the other hand, I do of course support either self hosting, or using another provider so as to ensure we do not end up with a Gmail monopoly. If I did not self host, I would find another provider like (but may not) Fastmail, Posteo etc (I would have to seriously review the options, which I haven't done).