I'm someone in exactly the same situation as the author of this blog post. I appreciate your well-meaning response, but the bottom line is that Google will have

I'm someone in exactly the same situation as the author of this blog post. I appreciate your well-meaning response, but the bottom line is that Google will have to offer a way for a real two-way communication channel for email administrators or be considered as acting in bad faith. There needs to be a way to inspect what caused mail delivery so we are able to fix it. There needs to be a way to provide feedback to Google about mail that was wrongly rejected. If you can push this forward internally, please do it. This is a far too regular occurrence to just ignore: it is a rule that delivering email to gmail from outside is unreliable, not an exception.