dovecot - Sep 2011 - NO Unknown subscription namespace.

Hello,

what this message means?

"NO Unknown subscription namespace."

the shared namespace is visible and I can fetch messages from it, but
subscription fails with the above message.

(user002 is sharing the folder named docs-users002 with user user001)


# telnet localhost 143
Trying ::1...
Connected to localhost.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE
AUTH=PLAIN] Dovecot ready.
. login user001 secret
. OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT
SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT CHILDREN
NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT
SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS ACL RIGHTS=texk] Logged in
. list "shared." "*"
* LIST (\Noselect \HasChildren) "." "shared.user002"
. OK List completed.
. list "shared.user002." "*"
* LIST (\HasNoChildren) "." "shared.user002.docs-user002"
. OK List completed.
. list "shared.user002.docs-user002." "*"
. OK List completed.
. select "shared.user002.docs-user002"
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)] Flags
permitted.
* 2 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1315765265] UIDs valid
* OK [UIDNEXT 3] Predicted next UID
* OK [HIGHESTMODSEQ 3] Highest
. OK [READ-WRITE] Select completed.
. fetch 1 all
* 1 FETCH (FLAGS (\Seen) INTERNALDATE "24-Nov-2009 11:58:34 +0100"
RFC822.SIZE 3734 ENVELOPE ("Tue, 24 Nov 2009 07:58:34 -0400 (AST)"
"Thank you for registering for the Red Hat Virtual Experience"
(("support at virtualevents365.com" NIL "support"
"virtualevents365.com")) (("support at virtualevents365.com"
NIL "support" "virtualevents365.com")) (("support at
virtualevents365.com" NIL "support"
"virtualevents365.com")) (("damocles- at hotmail.com" NIL
"damocles-" "hotmail.com")) NIL NIL NIL
"<6955854.2731259063914762.JavaMail.root at
app130.vs.int.cgsinc.ca>"))
. OK Fetch completed.
. subscribe "shared.user002.docs-user002"
. NO Unknown subscription namespace.
. logout
* BYE Logging out
. OK Logout completed.
Connection closed by foreign host.

???? /----------------/

namespace {
? inbox = yes
? location = 
? prefix = INBOX.
? separator = .
? subscriptions = yes
}
namespace {
? list = yes
? location = maildir:/var/virtual-maildir/%%n
? prefix = shared.%%n.
? separator = .
? subscriptions = no
? type = shared
}

On Mon, 2011-09-12 at 09:14 +0100, mailing lists wrote:
> Hello,
> 
> what this message means?
> 
> "NO Unknown subscription namespace."
It means that the namespace itself has subscriptions=no, and there are
no "parent namespaces" with subscriptions=yes.
> namespace {
>   inbox = yes
>   location = 
>   prefix = INBOX.
>   separator = .
>   subscriptions = yes
> }
> namespace {
>   list = yes
>   location = maildir:/var/virtual-maildir/%%n
>   prefix = shared.%%n.
>   separator = .
>   subscriptions = no
>   type = shared
> }
I guess you'd want INBOX. namespace to handle the subscriptions here,
but it doesn't work like that because in some configuration it could be
ambiguous which namespace to use.. You'll need to create a
prefix=""
namespace to handle the subscriptions. For example:

namespace {
  prefix   list = no
  hidden = yes
}