How are people sending emails from their self hosted apps? I Thought MailSender would be good but i guess not. Im about to try SendPulse now. Why isnt there a service that doesnt care what you do with your emails as long as you only sending max a few emails a day?
Check if your ISP has an SMTP service. I use mine for alerting when stuff breaks and haven’t had any issues. If you use your own domain name and have trouble with delivery, you could try setting up SPF.