Unless you are just emailing yourself on your server, chances are that 80% of your email is searchable between Google, Microsoft or Amazon. I just checked on m

Unless you are just emailing yourself on your server, chances are that 80% of your email is searchable between Google, Microsoft or Amazon. I just checked on my mail (look at headers, for smtp hosts not just senders and receivers). For me its 76% for the past 7 years, that either originated or ended in one of the big three silos.