The #Fediverse is based on the #ActivityPub protocol.
It is not owned by anyone.
There are multitudes of software and sites that communicate this way.
The one gaining traction right now is #Mastodon.
Our instance is social.stlouist.com
You should be able to change your provider and software you use for email.
Using the #ActivityPub protocol lets you do this.
This is the way.