Yes. In theory no, but in practice the big the providers just randomly disappear a certain percentage of your emails. They don't get marked as junk, just never

Yes. In theory no, but in practice the big the providers just randomly disappear a certain percentage of your emails. They don't get marked as junk, just never get to the recipient. After 15 years of running my own email server I gave up and paid one of the commercial suppliers to ensure my emails arrived.