I gave up on keeping my main on my own domain a few years back since MS mailservers (both Azure and on-prem Exchanges) started rejecting as spam, spam drove us

I gave up on keeping my main on my own domain a few years back since MS mailservers (both Azure and on-prem Exchanges) started rejecting as spam, spam drove us all to centralization and now that they're running amok we have no good recourse.