On Tue, Aug 20, 2019 at 07:31:57AM -0400, Henning Follmann wrote:
If you setup your DNS properly create SPF an DKIM almost all providers will accept your email IF (and that's a very big if) you do not spam.
That's a nice idea, but simply not true. You'll be ok right up until you aren't, and as a small site you have no recourse to find out what the problem is.