Their users are suffering because of phishing.<p>Measurably.<p>And as to &quot;sufficient warning,&quot; sure, I can see that it would be nice to have given people like you more lead time.  But then again, &quot;GMail has always supported encryption in transit using TLS,&quot; and if you care about running your own email server, it feels to me like the writing has been on the wall for that one for a long time.