I am very much in on this.
- As would be required by Cloudron, there is an official Docker-/ OCI-Container available.
- As there is a lack of "One Click" deployment options for a containerized
grommunioinstance, Cloudron could easily become the go-to-solution.
grommuniorequires a subscription for most deployments Cloudron could attract customers that are already willing to pay for open source software and are therefore more likely to pay for a Cloudron subscription as well.
- As grommunio aims to "exchange your Exchange", a lot of people frustrated by too many Microsoft Exchange annoyances – most recently Y2K22 – there are a lot of potential customers, especially if containerized hosting of it would be more straight forward. The Rainloop App is nice for simple deployments, but not for anyone that aims to do that.
- Doing a quick sweep I could not find any viable Enterprise-grade open source mail server solution that offers an officially maintained docker container image.
- The container image is not distributed through any major container registry (that I know of), but has instead to be loaded from a tarball (like
wget -qO - "https://download.grommunio.com/appliance/grommunio_Appliance.x86_64-latest.tar" | podman load),
- Running multiple instances on the same host would call for a pretty complex
nginxconfiguration (SMTP, IMAP, POP3, WEB) or dedicated IP addresses (as I have proposed elsewhere).
Looks like a cool groupware solution. Installation looks complicated though. https://grommunio.com/
At this point, the official virtual appliances are more easy to install, if you simply want to try it out. There are some useful instructions for containerized deployment as well, but I agree that at least that one isn't very straight forward.
At the moment I have a possible project that calls for the deployment of Nextcloud instances and E-Mail server solutions across multiple sites. I would love to use Cloudron for both tasks, but I am afraid that Cloudron's built in Mail server solution is no viable replacement for Exchange.
I will probably have to go for the virtual appliances, then; despite preferring containerizing.