>>105694384
From personal experience:
You're going to have to jump through all sorts of hoops (SPIF, DKIM, reverse PTR, making sure the servers IPv4 you got hasn't been on any of the big anti-spam lists since the inception of the internet or it's already over anyways, etc) and you ARE going to get filtered anyways because email is a cartel.
My go to example is the one server with a clean IP that has been used for NOTHING but a singular email server for the last 10 years and it still gets filtered half the time by Gmail despite my setup when using Googles own fucking tool to check records, etc giving me a perfect score minus 0.1 points for not using Gmail.
And no the other big email providers aren't any better, they may vary in terms of how much they suck but they still all suck dick at the end of the day.
The worst one I have ever seen was a German email provider that blacklists anyone that doesn't have their personal address listed on their website. No I am not fucking kidding, they expect you to dox yourself if you want any of your emails going through.