> was hoping for a web client to easily switch between multiple domains That can be the end result if you go with a webmail client like Roundcube or SoGo, yes.

> was hoping for a web client to easily switch between multiple domains That can be the end result if you go with a webmail client like Roundcube or SoGo, yes. If you go with a managed provider, as mentioned, I think they should all have some options for that in their paid plans and you'd have to consult their docs on it.