I have a domain and it points to SimpleLogin. I then have 400 aliases that all point to a proton email address which I give out to no one. If I don’t like Proton or want to use Proton and Tuta, I can direct my mail to both at the same time. I can also respond as any of the aliases from either mailbox.
SimpleLogin gives me the ability to point all 400 aliases to a new mailbox in minutes. No more going around every website to use my new email address like I did in the past.
Sure. Hence why the fair phone is bigger.