The mail clients I use (Thunderbird on desktop and K9 on Android), by default, don't load remote content unless explictly told to. I don't use web clients to a

The mail clients I use (Thunderbird on desktop and K9 on Android), by default, don't load remote content unless explictly told to. I don't use web clients to access email, so my question is, do web mail clients load remote content automatically?