4 (The upper item has the greater priority or feasibility... maybe :-)
7 o original icons and logos
8 o folder management enhancements
9 o more robust IMAP4 response parser
10 o enhancement of filtering
11 o support for some formats other than MH and mbox (ex. Maildir)
12 o priority (Priority:, X-Priority:, X-MSMail-Priority:)
13 o notification of reception (Disposition-Notification-To:)
15 o customization of toolbar
16 o configuration for each folders
17 o RFC 2231 (MIME filename encoding) compliant
18 o full-text search using Namazu
20 o console mode interface
22 o mailing list manager
23 o inline image display on multipart MIME
25 o make the code cleaner
26 o make the process faster
27 o make the dubious English much decent :)
29 Partially implemented features
30 ==============================
31 . make the network related code much decent
32 (processing of time out, multi-threading etc.)
34 . full internationalization
37 . display of HTML messages (composition of HTML message is not scheduled :-P)
38 . progress display of time-consuming processes
39 . parallel processing between sending-receiving and others
40 . customization of key bindings
44 * multipart MIME (attachments of files)
47 * management of read message on POP server by UIDL
50 * reconnection when connection to news server is broken
52 * preservation of position or size of window
53 * external editor support
55 * extension of quotation format
56 * assignation of location of mail folder
57 * account selection on composition window
58 * posting to newsgroups
59 * completion of mail address
60 * prohibition of multiple execution (with Unix domain socket)
61 * periodical check of newly arrived mails
62 * modification of display color
63 * designate the displayed headers
64 * user-defined headers
66 * list view of newsgroups and subscription of groups from there
69 * full-text search of messages (plain)
71 * regular expression support at filtering