https://mailinabox.email/ https://mailinabox.email/ does pretty much everything listed and more (and is being reviewed by more people so it might be better and

https://mailinabox.email/ https://mailinabox.email/ does pretty much everything listed and more (and is being reviewed by more people so it might be better and more secure), automated, so doesn't take 2 hours but rather 20 minutes. They have a docker branch in github but atm there's no work on it anymore. It does work very well though. In a nutshell: if anyone is up for working on secure email in docker, please continue the work done on MIB already and contribute.