dockerized VS Mailu

We still run multiple own mail servers for sending 100.000 transactional emails per month. For GDPR reasons and because we have existing contracts with our customers which name all our used IT suppliers, which we don't want to touch to add a new one. We started with iRedMail, now use mailu (fewer moving parts, IMHO).

Currently we do that with iRedMail in a Docker container, but it has a lot of moving parts (Postfix, Dovecot, Nginx, MySQL, Amavisd-new, SpamAssassin, ClamAV, RoundCube) that can potentially fail.

We use iRedMail in Docker as mail server, works for 250.000 transactional emails per month.

Consider installing Mailu instead, which is a single Docker container with a full mail server and Roundcube on top. Very easy to install.

I've been using Mailu (https://mailu.io/) for years and have had no problems. I love that it has the concept of domain admins so that people can manage mailboxes for their own domains. DNS isn't automatic, but meh. Upgrading is easy (Docker + automatic migrations).

Mailu is pretty solid for personal use and is lighter on memory than Mailcow

While hosting mail isn't easy, Mailu and similar projects make it way easier than it used to be.

Mailu on a cheap VPS: https://mailu.io

Mailu. It’s a docker image that has the whole email system pretty much all done for you. If you don’t know docker, learn it it’s well worth it.

So as the title says, I'm trying to set up a dockerized mailu server. I've done the docker compose setup from the mailu.io site, except it doesn't seem to work and I'm not exactly sure why. I'm guessing I'm just not entering in some information correctly, but I don't know for sure. One thing I know I'm not sure on is the db url and what exactly is it supposed to be. I don't remember the exact error I'm getting, as I'm not in front of my computer at the moment, but I do know it was the admin container that wasn't working properly. Either that or I don't have my DNS set up correctly.