I use Mail-in-a-Box on a VM at home. Static IP from my ISP. Been working well for years now. I recommend it.

If your IP isn't trusted you could always use an SMTP relay somewhere else.

They may be the biggest installer of renewable energy, but what percentage of their electricity comes from renewables? If they're installing more coal than renewables then it's still not better.

They're also deploying coal faster than anyone else.

I've heard this argument before about the efficiency of burning centrally, usually in a European context to defend running EVs on a grid powered mostly by natural gas, but not for coal.

Now I'm genuinely curious whether efficiently burning coal to power EVs is less bad for the environment than burning petrol in ICE cars. Is there any research on that?

I agree that ultimately EVs are the future, and I do drive one myself and strive to charge it on renewables whenever possible. However, in places with dirtier grids I'm not sure they're a great idea.