I've had mild but inconsistent success sending to gmail with a perfect setup with 100% compliant dkim and spf, but Microsoft servers might be flat-out unreachab

I've had mild but inconsistent success sending to gmail with a perfect setup with 100% compliant dkim and spf, but Microsoft servers might be flat-out unreachable with no way to appeal: https://news.ycombinator.com/item?id=35691618 https://news.ycombinator.com/item?id=35691618 In the end I set up a gmail account just to route all my outgoing mail through, with a whitelist of specific servers I know won't reject me for no reason (i.e. a few very small email services or friends who also self-host). Defeats half of the purpose but what can you do? There's nothing else I can possibly do to make my emails reach hotmail inboxes - I've exhausted all of their phony support channels and advice articles and clearly they just want me to go away and stop self-hosting.