(The upper item has the greater priority or feasibility... maybe :-)
o POP before SMTP
-o full-text search of messages (plain, or hooking up with Namazu)
o original icons and logos
o autosave
-o template function
o speed-up of filtering
o regular expression support at filtering
-o LDAP support
o support for some formats other than MH and mbox (ex. Maildir)
o priority (Priority:, X-Priority:, X-MSMail-Priority:)
o notification of reception (Disposition-Notification-To:)
o customization of toolbar
o configuration for each folders
o RFC 2231 (MIME filename encoding) compliant
+o full-text search using Namazu
o virtual folder
o console mode interface
o plug-in faculty
* IMAP4 support
* list view of newsgroups and subscription of groups from there
* SSL support
+* LDAP support
+* full-text search of messages (plain)
+* template function