I don't want GBs of emails on my phone, desktop, laptop, wife's laptop, work PC, and anywhere else that I want to use email. And I don't want to waste power an

I don't want GBs of emails on my phone, desktop, laptop, wife's laptop, work PC, and anywhere else that I want to use email. And I don't want to waste power and time syncing all that data between those devices just so i can do the same things i can now but less efficient (and with still more drawbacks)