* Client certificate authentication
* Page long outputs (box search results, message queue)
* Document opening in external application (mailcap, mimeinfo, xdg-open)
* Item iteration (for-each document in a message etc.)
* Local message storage (easy mirroring)
* Address book (LDAP extension?)
* Signed CMS message signtature and time stamp verification
* Pipe output to external program (e.g. lpr)
* Display envelope details of a message from message list
* Change current item context manualy (e.g. between cached message and list)
* I18N and L10N manual (po4a and gettext)
* Make configuration settable at run time (with storing to config file?)
* Mark message as read at message retrieval (configurable)
* Message to MIME e-mail conversion and forwarding?
* Pinetry integration
* Unify UI toolkit, abstract layer with optional GUI binding (like linphone)
* Command line argument quoting
* Fix file name de-escaping
* Better default value selection (prefill readline input?)
* Simple message queue statistics after log-in (You have no new messages)
* Confirm message sending