I am using mailbox.org and they are very good at what they do. The company behind them do mailserver stuff for 20+ years. BUT their UI is from the 90s which ru

I am using mailbox.org and they are very good at what they do. The company behind them do mailserver stuff for 20+ years. BUT their UI is from the 90s which rules them out by the requirements. It‘s not a bummer for me as I never use the Web UI.