Secure Email Based in Switzerland: Protonmail
A nice tool, pro:
-> End-to-End Encryption
-> Anonymous Email
-> Open Source
-> Easy to Use
the free version does not provide, con:
-> more than 3 folders / labels
-> more than 500 MB space
-> more than 150 messages a day
E-Mails that are not stored in the archive get deleted automatically after 5 days