Back before sigaint there was an onion email service, lelantos (http://lelantoss7bcnwbv.onion) that worked for about a year. Then I stopped using it when sigaint came out. I still have an account but I can't seem to send email anymore. I keep getting a "504 Gateway Time-out nginx" when I hit send (with the non JS, squirrelmail)
I use lelantos just fine non js