That's what we have now, SMTP open relays are not the out of the box configuration. The problem is who owns that SMTP server. If I self host then the big provid

That's what we have now, SMTP open relays are not the out of the box configuration. The problem is who owns that SMTP server. If I self host then the big providers don't want to know me. Google goes straight to spam regardless of SPF/DKIM and Microsoft flat out 550 refuses to even accept a connection. A local ISP also pre-banned me because of DigitalOcean's past lax approach to stamping out spammers on their droplets.