I can suggest having a look at Infomaniak: https://www.infomaniak.com/en/ksuite/service-mail https://www.infomaniak.com/en/ksuite/service-mail And with the kSu

I can suggest having a look at Infomaniak: https://www.infomaniak.com/en/ksuite/service-mail https://www.infomaniak.com/en/ksuite/service-mail And with the kSuite, you have everything: file storage, chat, emails... I have no involvement with the company, except as a happy customer for many years