Why wouldn't you be able to set up your own email server anymore? Yes, you need to configure authentication (DKIM, rDNS and preferably DMARC) but you should be

Why wouldn't you be able to set up your own email server anymore? Yes, you need to configure authentication (DKIM, rDNS and preferably DMARC) but you should be doing that anyway, the hard requirement doesn't change that. One-click unsubscribe is required for bulk email, but you probably don't want to be sending bulk mail from your self-hosted solution anyway. Anti-spam isn't killing the internet, spammers did.