Follow-up to Secure Email and Posteo.de.
I researched the email security market a bit more, and it shows that good old hushmail is probably the most secure system you can get. They offer basic security measures like TLS encryption for POP/SMTP connections and SSL encrypted browsing, but imho no ISP should bother offering email service if they are not able to set up an SSL certificate. The most promising feature is the end-to-end encryption of messages between two hushmail users. Hushmail states that these emails are stored encrypted on their servers and are decrypted each time the