As the article indicates the same is not always going to be the case with google. With my email I spent about 6-8 hours setting it up a few years ago and haven

As the article indicates the same is not always going to be the case with google. With my email I spent about 6-8 hours setting it up a few years ago and haven't had to touch it since. Never had issues with spam or deliverability. Any decent hosting company should be able to provide the same, might cost more than google though.