Hermes Encrypted IMAP Email Client is a Tweak-based email client using C libraries (via Canard plug-in) for encrypted email server communication. It can be run as a stand-alone application, or via a web browser (via NPSqueak plug-in).
Designed to be a replacement for slow and clunky web-based email clients, Hermes features full IMAP mailbox manipulation using familiar tree-like UI, an intuitive drag and drop interface, an integrated internet-based spell check facility, local session caching (mailbox message lists and message contents). IMAP support is missing, but we are working on it.
Hermes is configured for the University of Minnesota email servers, but provides API for IMAP/SMTP hosts, usernames, passwords, ports and paths, allowing portability (currently requires a little under-the-hood reconfiguring)