Ya got that right..and ALL internet providers have yours and the person you are mailing to isp numbers. It is in the hidden header of every single internet provider email. Just look in your email program for long or full header..and low and behold..there it is. It shows your isp and that of every computer your email went thru to get to the person you sent it to..and includes theirs..and on your incoming mail, its the opposite way around..theirs first yours last...and they ALL will work with law enforcment when called upon.
Hush mail. Encrypted. When they get the email, they have to go to Hushmail to open it and use the password you gave them.