http://mynymecyaiv7t55qiggp76rzqz35si5g7nzdh3yci4wiqbmlwqg7xeyd.onion/email-hosting
For our webmail client Roundcube is a PGP encryption module active. With that module you can create, import and manage your keys. You can also sign, encrypt and decrypt emails and even files! How do you handle spam? We run a spamfilter, every user is able to create own rules, blacklists and whitelists.