[bug-mailutils] Re: IMAP protocol violation in 1.1

[Simon Josefsson]

Here is another protocol problem:

436 SELECT "INBOX.Trash"
* 4 EXISTS
* 3 RECENT
* OK [UIDVALIDITY 0] UID valididy status
* OK [UIDNEXT 5] Predicted next uid
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS (\Answered \Deleted \Seen)] Permanent flags
436 OK [READ-WRITE] SELECT Completed
437 UID SEARCH UNSEEN UNDELETED
* SEARCH 2 3 4

Note it says 2 3 4 are unseen.

437 OK UID SEARCH Completed
438 UID SEARCH SEEN
* SEARCH 1
438 OK UID SEARCH Completed
439 UID SEARCH ANSWERED
* SEARCH
439 OK UID SEARCH Completed
440 UID SEARCH RECENT
* SEARCH 2 3 4
440 OK UID SEARCH Completed
441 EXAMINE "INBOX.Trash"
* 4 EXISTS
* 3 RECENT
* OK [UIDVALIDITY 0] UID valididy status
* OK [UIDNEXT 5] Predicted next uid
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS ()] No Permanent flags
441 OK [READ-ONLY] EXAMINE Completed
442 CLOSE
442 OK CLOSE Completed
443 EXAMINE "INBOX.Trash"
* 4 EXISTS
* 3 RECENT
* OK [UIDVALIDITY 0] UID valididy status
* OK [UIDNEXT 5] Predicted next uid
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS ()] No Permanent flags
443 OK [READ-ONLY] EXAMINE Completed
444 FETCH 1,* UID
* 1 FETCH (UID 1)
* 4 FETCH (UID 4)
444 OK FETCH Completed
445 SELECT "INBOX.Trash"
* 4 EXISTS
* 3 RECENT
* OK [UIDVALIDITY 0] UID valididy status
* OK [UIDNEXT 5] Predicted next uid
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS (\Answered \Deleted \Seen)] Permanent flags
445 OK [READ-WRITE] SELECT Completed
446 STATUS "INBOX.Trash" (UNSEEN)
* STATUS INBOX.Trash (UNSEEN 3 )

The space after 3 and before ) isn't permitted by the ABNF.

446 OK STATUS Completed
447 EXPUNGE
447 OK EXPUNGE Completed
448 UID SEARCH UNSEEN UNDELETED
* SEARCH

Huh!  The UNSEEN flags are now gone?  How did that happen?

448 OK UID SEARCH Completed
449 UID SEARCH SEEN
* SEARCH 1 2 3 4

Indeed, all messages are marked as SEEN.

449 OK UID SEARCH Completed
450 UID SEARCH ANSWERED
* SEARCH
450 OK UID SEARCH Completed
451 UID SEARCH RECENT
* SEARCH 2 3 4

However, they are still RECENT which seems confusing.

451 OK UID SEARCH Completed
452 EXAMINE "INBOX.Trash"
* 4 EXISTS
* 3 RECENT
* OK [UIDVALIDITY 0] UID valididy status
* OK [UIDNEXT 5] Predicted next uid
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS ()] No Permanent flags
452 OK [READ-ONLY] EXAMINE Completed
453 CLOSE
453 OK CLOSE Completed

Maybe there is some confusion between SEEN and RECENT?  RECENT should be
cleared when you re-SELECT a mailbox, but SEEN should only be changed
when the client set flags.

Thanks,
/Simon