title: How to clear Google Proxy or googleusercontent.com cache?
body: <p>A wrong image file has been cached by Gmail's <a href="https://filippo.io/how-the-new-gmail-image-proxy-works-and-what-does-this-mean-for-you/" rel="noreferrer">Google Proxy</a> that runs under googleusercontent.com and we are looking into deleting the cache. The original file is linked from Amazon S3. We want to force a cache invalidate, so emails sent yesterday (5M) display the correct image.</p>
  
  <p>Facebook has the Linter page but how do we do on Google Proxy?</p>