I own domains backed by gsuite/postini and they are awesomely spam free, and good. What I say here shouldn't be taken as saying I don't want that goodness. I also work in domains which routinely get mis-tagged as spammy by google, and that can include replying to google staffers. This isn't good. Understandable, faking flows into your own mail must be a big problem for big mail hosters, mainly doing mail for other people. Oddly, no other enterprise I deal with does this: Only google tags google staffers as spam, when they interact in GMail and G/Suite. It would help enormously if google told us A/B Black/White techniques for our own mail investments in GSuite, which are functionally able to do things, not just community curated hints. But, the "things you can do" feels more like "things you can try" Part of this, is the freemium levels in Google don't go to people. You have to pay google money to get people to talk to. The second part is that we want to believe the awesome, but most people you can talk to in Google are robots with scripts. I have had the great pleasure of speaking at a meeting, with Google staff present, showing a thing which is in some sense "something is wrong" and having them get up to the microphone queue and say "I fixed that" -And it is awesome but its not repeatable, its not sold as a product to everyone, its rare, and it actually hurts more than it helps: Privilege outcomes is why people mail NANOG asking for help. Its not service level, it drives to tweet storms about problems to get fixed. For instance, it isn't clear to me how adding addresses to your own address book does materially interact with spam tagging. I added all the google staffers I deal with, they are still spam boxed. This is one of the recommendations from some years back. Did it ever work? Is it "official" or just an idea? How do you tell? I fully expect the usual ASCII list of "your idea won't work because" but the quality I am trying to get to here, is that mail un-spam and un-filter and un-protect is basically now not just a heuristic, but an undocumented heuristic: we don't know the interactions of the moving parts, and when we ask about the moving parts, the answers feel like smirks. Who you are alters what kind of reply you get back. -George (posting from a g/suite free edition hosted domain btw)