[vbsteven]

Actually my business email is currently setup like this. I have a business o365 account and use Outlook on Windows/MacOS/android/iphone and Thunderbird on Linux.

But I want to move away from it because I want to 1) gain control over my data and 2) extend the system with automations.

Thats why I started researching open source and self hosted alternatives.

[Const-me]

You can run all of the above on your own server[s]. Gonna be expensive though, e.g. $500 just for the OS.