What about &quot;Your message was categorized fir Bayesian spam filtering and may have contributed to eventual upstream rules&quot; for all those installations that historically ran SpamAssassin?<p>If you&#x27;re using Gmail or sending to a gmail address[1], you know what you are in for, and if you don&#x27;t you should at least know that anything you send to someone else is no longer in your control and you have very little control over who sees it.<p>1: Google Apps for business accounts are not scanned for ads.