Thoms

I’m trying Sync, Infinity and Thunder. I like Sync and Thunder because I like the polished UI. Infinity looks and feels kinda ‘old’. But this is just me. All three deliver the feeling of coming home. They work like before, but with Lemmy features like images in comments. It’s like Reddit but on the fediverse.

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.

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.

Maybe google blocks large IP-blocks of vps-hosters like digital-ocean then? I moved My mail-setup from a 15y old ip with best reputation to a new one on the vps-hoster that is listed as provider on the mailcow-site. I have no problems at all, I have DMARC reports enabled and all mails to gmail are passing.

The only provider that was blocking the ip was german telekom, t-online. I wrote a mail to the abuse/postmaster and with some asking for imprint on the webpage that the ip was pointing at, they whitelisted the ip in 24h.

mailcow has some sort of dns-settings agent that shows the dns-settings for every domain, rDNS and DKIM, DMARC, SPF and check these settings with the values reported by the DNS.

Just take a look at https://docs.mailcow.email/

This runs from a small box with everything included. It gives you all the tools and config needed for running a secure and feature rich email service. Webmail, some sort of exchange emulation, webcalender on top of a solid postfix/dovecot install with rspamd as spam filter. Everything is configurable via a nice web UI.

After 15y running my own mail service and editing a lot of config files, I use this piece of free and open software and find it very good. All you need is a box somewhere in the internet. Running from a homelab will instantly fail, expect you have a static ip.