I feel more and more like. That email should be like DMs.

Do you want to accept emails from xxx?

Yes

No

On client side...

I think that would lead to this:

Do you want to accept emails from "For a limited time, save up to 35% on orders from Fluppsi! Click Yes for this amazing opportunity!"

Very dangerous, when the same From address may be used for "Log in inside 14 days or your dormant account will be deleted".