What you don’t like having your email data mined and having targeted ads sent to you?
Setting up your own email server would probably be the only way to have some privacy. The emphasis is on the word some.
If your Server is setup to use TLS, then it automatically sends it encrypted as long as the receiving Email Server has TLS implemented. (Not all do).
But at least your emails won’t be data mined like GMAIL, Yahoo or HOT mail.
A 2nd less secure option would be to open an account on a secondary provider like your ISP. Their not as likely to be actively data mining your emails to send you targeted ads.
An additional benefit of this, is that it loosens the tie to your ISP. You can change internet providers fairly painlessly.
I use pobox.com, but there are several others out there. Google "email forwarding service" and you should find others. As a satisfied customer, I strongly recommend pobox.com though, as their spam filtering is really good. One drawback is that there will obviously be a slight delay in getting mail because email has to first go to them before it is routed to you.
Disclaimer: I have no relationship to pobox.com other than being a long-standing satisfied customer of theirs.