Upvote for mailcow. It’s a classic postfix+dovecot email stack with lots of stuff figured out for you already. I host on a cheap vps that supports SRV records so rDNS passes, and then I still route my outgoing mail through Mailgun for better IP reputation. At my low (normal) mailing levels Mailgun is free.
This is as laughable as people who think Joe Biden single handedly increased gas prices, like it’s not an incredibly interconnected global economy with hundreds of factors that impact it.
Glad to see brilliant minds are hard at work on the real issues lol.