remove intention to implement \important special-use mailbox and $important message flag, rfc 8457

they are intended to be used by the server to automatically mark some messages
as important, based on server-defined heuristics. we don't have such heuristics
at the moment. perhaps in the future, but until then there are no plans.

README.md

@@ -138,7 +138,7 @@ https://nlnet.nl/project/Mox/.
 - "mox setup" command, with webapp for interactive setup
 - Automate DNS management, for setup and maintenance, such as DANE/DKIM key rotation.
 - Calendaring with CalDAV/iCal
-- More IMAP extensions (PREVIEW, IMPORTANT, COMPRESS=DEFLATE, UNAUTHENTICATE,
+- More IMAP extensions (PREVIEW, COMPRESS=DEFLATE, UNAUTHENTICATE,
   REPLACE, QUOTA, NOTIFY, MULTIAPPEND, OBJECTID, MULTISEARCH, THREAD, SORT)
 - Introbox, to which first-time senders are delivered
 - ARC, with forwarded email from trusted source

imapclient/cmds.go

@@ -150,7 +150,7 @@ func (c *Conn) Examine(mailbox string) (untagged []Untagged, result Result, rerr
 
 // Create makes a new mailbox on the server.
 // SpecialUse can only be used on servers that announced the CREATE-SPECIAL-USE
-// capability. Specify flags like \Archive, \Draft, \Junk, \Sent, \Trash, \All.
+// capability. Specify flags like \Archive, \Drafts, \Junk, \Sent, \Trash, \All.
 func (c *Conn) Create(mailbox string, specialUse []string) (untagged []Untagged, result Result, rerr error) {
 	defer c.recover(&rerr)
 	if _, ok := c.CapAvailable[CapCreateSpecialUse]; !ok && len(specialUse) > 0 {

imapserver/list.go

@@ -191,21 +191,17 @@ func (c *conn) cmdList(tag, cmd string, p *parser) {
 					flags = append(flags, bare(`\Subscribed`))
 				}
 				if info.mailbox != nil {
-					if info.mailbox.Archive {
+					add := func(b bool, v string) {
-						flags = append(flags, bare(`\Archive`))
+						if b {
-					}
+							flags = append(flags, bare(v))
-					if info.mailbox.Draft {
+						}
-						flags = append(flags, bare(`\Drafts`))
-					}
-					if info.mailbox.Junk {
-						flags = append(flags, bare(`\Junk`))
-					}
-					if info.mailbox.Sent {
-						flags = append(flags, bare(`\Sent`))
-					}
-					if info.mailbox.Trash {
-						flags = append(flags, bare(`\Trash`))
 					}
+					mb := info.mailbox
+					add(mb.Archive, `\Archive`)
+					add(mb.Draft, `\Drafts`)
+					add(mb.Junk, `\Junk`)
+					add(mb.Sent, `\Sent`)
+					add(mb.Trash, `\Trash`)
 				}
 
 				var extStr string

rfc/index.txt

@@ -229,7 +229,7 @@ https://www.iana.org/assignments/message-headers/message-headers.xhtml
 8437	Roadmap	-	IMAP UNAUTHENTICATE Extension for Connection Reuse
 8438	Yes	-	IMAP Extension for STATUS=SIZE
 8440	?	-	IMAP4 Extension for Returning MYRIGHTS Information in Extended LIST
-8457	Roadmap	-	IMAP "$Important" Keyword and "\Important" Special-Use Attribute
+8457	No	-	IMAP "$Important" Keyword and "\Important" Special-Use Attribute
 8474	Roadmap	-	IMAP Extension for Object Identifiers
 8508	Roadmap	-	IMAP REPLACE Extension
 8514	Yes	-	Internet Message Access Protocol (IMAP) - SAVEDATE Extension

store/account.go

@@ -272,7 +272,7 @@ func (mc *MailboxCounts) Sub(delta MailboxCounts) {
 // understand where messages should go.
 type SpecialUse struct {
 	Archive bool
-	Draft   bool
+	Draft   bool // "Drafts"
 	Junk    bool
 	Sent    bool
 	Trash   bool

webmail/api.json

@@ -1631,7 +1631,7 @@
 				},
 				{
 					"Name": "Draft",
-					"Docs": "",
+					"Docs": "\"Drafts\"",
 					"Typewords": [
 						"bool"
 					]
@@ -3120,7 +3120,7 @@
 				},
 				{
 					"Name": "Draft",
-					"Docs": "",
+					"Docs": "\"Drafts\"",
 					"Typewords": [
 						"bool"
 					]

webmail/api.ts

@@ -192,7 +192,7 @@ export interface Mailbox {
 	UIDValidity: number  // If UIDs are invalidated, e.g. when renaming a mailbox to a previously existing name, UIDValidity must be changed. Used by IMAP for synchronization.
 	UIDNext: UID  // UID likely to be assigned to next message. Used by IMAP to detect messages delivered to a mailbox.
 	Archive: boolean
-	Draft: boolean
+	Draft: boolean  // "Drafts"
 	Junk: boolean
 	Sent: boolean
 	Trash: boolean
@@ -498,7 +498,7 @@ export interface ChangeMailboxSpecialUse {
 // understand where messages should go.
 export interface SpecialUse {
 	Archive: boolean
-	Draft: boolean
+	Draft: boolean  // "Drafts"
 	Junk: boolean
 	Sent: boolean
 	Trash: boolean