Posteo.de 1$ a month is an extremely trustworthy email website look it up,
openmailbox.org is an okay one also, with one exception, they do track you when your not in the webmail login area or logged in.
Those two are my recommended picks though. both are under free software licenses. and posteo.de has no cookies whatsoever. I use privacybadger and many other addons for blocking scripts so those two are your best bet.
Openmailbox.org is also free by default.
