I used to run Qmail on my private server and it was great, very secure, pretty easy to set up for my use case. And even configuring and training spam assassin w

I used to run Qmail on my private server and it was great, very secure, pretty easy to set up for my use case. And even configuring and training spam assassin wasn't too hard and it worked well. But like many people, what made me finally give up was mail delivery issues. I used to run email on a home server, and those IP's were blacklisted by many providers long ago, then I moved to EC2 until those IP's were blacklisted to. Finally I colocated a small server which worked fine for a while until neighbors in my subnet kept getting me blacklisted. Finally I got too frustrated with undelivered or silently dropped emails and just moved everything to Google GSuite.