@pinkdogfan

No.

Think about your telephone.

Does any single company control all the world's phone networks? No.

You can choose whatever phone provider you want, move to another provider, move country etc but still make calls to everyone everywhere because all the providers talk to each other.

Email is the same.

This is how all communication networks used to work before Twitter and Facebook tried to take over and centralise stuff.

There's a video about this here:

https://framatube.org/w/9dRFC6Ya11NCVeYKn8ZhiD