Setup for many users?

PelleH

I have used Mailcow for a long time for some smaller organizations’ e-mail etc. and then it has been enough and the performance has been transferred to a small VM. If I were to use it for a larger organization, say 15,000 people - how can I scale Mailcow? I can always allocate more resources such as CPU and RAM but that also takes a toll eventually. Is there a way to maybe split all the parts on your own VMs, split functions on several containers? Is it possible to configure HA?
Is it possible to spin up in Kubernetes or Openshift?
It is in the early idea stage but the thoughts are to replace another large e-mail server function.

ETNyx

Hello,
for this size of organization some HA deployment is most-likely necessary, and sorry, but MailCow is not build that way. One could adapt MC this way, but still updates would be nightmare to break something.

On the other hand, organization of this size should have enough resources, to pay own solution and You can find a lot of inspiration in MailCow after all it is open source.

PelleH

Tanks. It would be nice to have some product, like Mailcow, that can be used to start with. We can absolutely put together something similar to what Mailcow does, but it’s a bigger uphill battle to get started and then keep everything updated. It would be easier to start with a finished product, like Mailcow, and then develop from there and then feed the changes back to the project and help each other maintain it.

Ganzjahresgriller

You say you’re talking about an organization/company that has 15,000 clients. And you want to start developing there? How much time do you think your boss will give you? Depending on the environment, I’d go with something ready-made: Google Workspace, M365, or, in Europe mailbox.org.

esackbauer

Or Kopano, Open-Xchange, Grommunio if you want to stay in on-premise open source world. They have references of more than 15000 active users.