> They literally reject your emails. There is also nothing you can do if ms/google black lists you. There are so many ESPs that do not get rejected. Neither is

> They literally reject your emails. There is also nothing you can do if ms/google black lists you. There are so many ESPs that do not get rejected. Neither is it true that there isn't anything you can do if you end up on a blacklist. That's not to say that it's trivial, but it's certainly doable.