Discussion on answer by DevOps: Email provider rejecting my server emails

Honestly. I mean that with the best of intentions. I always appreciate when I'm called out on something, because it gives me a chance to better my skills. I hope you are able to do the same.

@Xalorous I'm beating a dead horse here, but apparently you're still not getting my initial concern. You keep saying that DNS records and open relays are related. They. Are. Not. Whether an SMTPd is an open relay or not is completely, 100% controlled by its configuration. The SMTP server's configuration. Not DNS records.