Ask HN: Gmail spam filtering suddenly marking everything as spam?
Summary
This Hacker News discussion examines reports that Gmail's spam filtering started marking nearly all emails as spam, even when SPF/DKIM are valid and whitelisting is in place. The thread debates whether this is a temporary outage or a broader filter change, with anecdotes about delays and messages flagged as suspicious across various categories. Some participants mention concerns about an AI training data toggle; others dispute that claim. The conversation also shares practical mitigations like using Gmail aliases, separate accounts, and manual whitelisting.