> If you were able to somehow get your own email server to deliver email to Gmail and Outlook, great, good for you - but stop pretending that anybody can do it.

Yes, that's probably true. I've been running my own server for 20 years now, and I guess that in itself helps with getting my mail delivered (apart from t-online, but who cares about them). At some time I also hosted some mailing lists, but I quickly abandoned that because that's a surefire way to get your IP blacklisted sooner or later. If you set up a completely new mail server, there probably is a lot of luck involved, and I wouldn't recommend it to anyone, at least not for your critical business mails. I pretty much keep doing it only out of nostalgia, it doesn't really make any sense otherwise.