Thinking of spinning one up for myself. Did you do all the dmarc/spf record setup & so that’s why it’s fine for you? 

 With DKIM/dmarc/spf properly setup emails should not be marked as spam 

 Ty for mentioning the 3rd, couldn’t remember it off the cuff. 

 Dont forget rdns for ipv6, gmail will definitely ban you without that 

 Can you omit that shitcoin of a protocol, or are you forced to support? 

 Not required 

 I was researching this last night and decided to dive into it so I can de google myself. Can I ask what software you run? Or what I would need to make a solid system? 

 I use an older variant of https://gitlab.com/simple-nixos-mailserver/nixos-mailserver 

 Thanks @jb55 I will learn and implement asap.