Is it possible these days to send emails from my backend server directly? I am worried about that the emails would not get through to the receiver. My use case would be to maintain my mailing list without having to share all emails with a service like mailchimp, which could be an issue due to gdpr.
It is certainly possible, although you have to deal with the reputation of your server's current IP addresses.<p>If you don't want to deal with that, you can still run the list yourself and just smarthost through a legitimate email provider. If you're afraid of leaking addresses, just find one that does short term or no logging.