run.app spam is happening using google mail servers

I'm already at the point with my email where I block anything containing firebaseapp (Firebase is Google's mobile/web app dev platform), and now I've had to block another, which is anything in an email containing run.app, the official domain associated with Google Cloud Run.

Crap like this is received in email, and it's obviously spam:

Look at the headers, and you see this:

Examine the email, and the run.app crap is present:

I know how to find and block this garbage, but I seriously doubt others would even know how to spot it. And since emails like this come from Google's own mail servers, they're "trusted" and will bust right through spam filters.

Ridiculous.

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