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this post was submitted on 12 Jun 2023
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Neato! There seems to be a lot of solutions for running a mail server.
Yeah, I think it is time, I need to get familiar with Docker.
Yeah, I was clueless thinking I could run it from my home. Hah. I just wanted to avoid paying for a VPS. Which is silly because I buy too much crap all the the time and have multiple subscriptions.
This is actually valauable.
mailcow lists a small german vps hoster with a fair price and the right sizing. It's not a big hoster, gmail and microsoft are not blocking the ip-range and the ASN is not listed on any blacklist.
The support is quick and helpful, rDNS was a matter of minutes to set up. You don't need any deeper knowlegde of docker, since it is a one-time job to set the things up und get the stack running. The documentation of mailcow is very good.
You can run it from home, but you will need a forward host like sendgrid and maybe a backup mx. You can set a primary ip and a backup ip wich will get all the mails when the primary host is down. I guess, there a comercial or free backup-mx services out there. No problem. If you have a static ip for your homelab or at least a dynamic dns-name, it will work. Recieving is easy. But you will need a good forward-service for sending.
Needing an extra service to forward emails seems to defeat the purpose of having everything local. Everything I read about email, being clear-text and whatever, makes it so it is impossible to improve. Email is a dead end, so I probably don't actually want to get too involved with it the more I learn.
I mean, growing up I really thought the internet would become a way to connect directly to people, computer to computer interaction. Everything requires an intermediate service, making everything insecure and expensive. What a stupid future.
That's right. Also important, email is not a playground for experiments. Once it runs, you should not touch it anymore, except for updates. Otherwise, you will do harm to your own way of communicating. One error, and you will lose all your reputation and someone spams half of the internet with your domain as sender.
An when it runs, the only thing to improve is tuning the spam-filter for your instance. Implementing all the rules that you fight the other day, because otherwise your inbox explodes. So you have to do all the shady things and block ips, filter with blacklists and check every dns for all those extra entries, needed for delivering mail... You must become a part of the problem, spammers all behind every cracked wordpress and insecure vps out there.
Damn, email seems to fragile. I am getting so many perspective, but the main thing that seems like such a gotcha is managing spam, which seems like such a headache.
No, I do not want to become part of the problem.