o list view of newsgroups and subscription of groups from there
o full-text search of messages (plain, or hooking up with Namazu)
o original icons and logos
-o designate the displayed headers
-o user-defined headers
o template function
o speed-up of filtering
o regular expression support at filtering
* completion of mail address
* prohibition of multiple execution (with Unix domain socket)
* periodical check of newly arrived mails
+* designate the displayed headers
+* user-defined headers