4 (The upper item has the greater priority or feasibility... maybe :-)
7 o list view of newsgroups and subscription of groups from there
8 o full-text search of messages (plain, or hooking up with Namazu)
9 o original icons and logos
10 o designate the displayed headers
11 o user-defined headers
13 o speed-up of filtering
14 o regular expression support at filtering
16 o parallel processing between sending-receiving and others
17 o support for some formats other than MH and mbox (ex. Maildir)
18 o priority (Priority:, X-Priority:, X-MSMail-Priority:)
19 o notification of reception (Disposition-Notification-To:)
20 o modification of display color
21 o customization of key bindings
22 o customization of toolbar
26 o console mode interface
28 o mailing list manager
29 o inline image display on multipart MIME
31 o make the code cleaner
32 o make the process faster
33 o make the dubious English much decent :)
35 Partially implemented features
36 ==============================
37 . make the network related code much decent
38 (processing of time out, multi-threading etc.)
40 . full internationalization
44 . display of HTML messages (composition of HTML message is not scheduled :-P)
45 . progress display of time-consuming processes
49 * multipart MIME (attachments of files)
52 * management of read message on POP server by UIDL
55 * reconnection when connection to news server is broken
57 * preservation of position or size of window
58 * external editor support
60 * extension of quotation format
61 * assignation of location of mail folder
62 * account selection on composition window
63 * posting to newsgroups
64 * completion of mail address
65 * prohibition of multiple execution (with Unix domain socket)
66 * periodical check of newly arrived mails