Re: Only INBOX can be LISTed after upgrade from 2.4.17 to 3.0.7

On a similar upgrade from EL7 to EL9 I had to add the following options to
imapd.conf

altnamespace: off
unixhierarchysep: off

IIRC the defaults were changed and we wanted the old configuration.

Regards,
Simon

> I recently upgraded the cyrus-imapd service on a heavily used internal
> IMAP server from version *2.4.17* (specifically, version
> *cyrus-imapd-2.4.17-15.el7.ppc64le* via standard RHEL7 package management)
> to version *3.0.7* (version *cyrus-imapd-3.0.7-24.el8.ppc64le* via
> standard RHEL8 package management).  After the upgrade (and a full
> "reconstruct -r -G -V max" for all mailboxes) my users are unable to
> synchronize any mailboxes other than "INBOX" using tools such as *mbsync*
> or *mutt*, and the *Settings* -> *Folders* facility of Roundcube
> <https://roundcube.net/> will only show the "INBOX" and no other folders.
> 
> I have found that when connecting to the *imaps* service on port 993 using
> the *openssl* client and using raw IMAP commands to interact with the
> service as follows:
> openssl s_client -connect imap-host.example.domain.com:993 -crlf -quiet
> then logging in and issuing a simple *LIST* command (as described by the
> IMAP RFC <https://datatracker.ietf.org/doc/rfc9051/>), the output only
> shows the INBOX and claims that is "HasNoChildren":
> . list "" *
> * LIST (\HasNoChildren) "." INBOX
> . OK Completed (0.000 secs 1 calls)
> whereas the old IMAP server running version *2.4.17* gives output that
> seems to reflect why they are now complaining:
> . list "" *
> * LIST (\HasChildren) "." INBOX
> * LIST (\HasNoChildren) "." Drafts
> * LIST (\HasChildren) "." "Junk Mail"
> * LIST (\HasNoChildren) "." "Junk Mail.Learn as HAM"
> * LIST (\HasNoChildren) "." "Junk Mail.Learn as SPAM"
> * LIST (\HasNoChildren) "." Sent
> * LIST (\HasNoChildren) "." Trash
> . OK Completed (0.000 secs 8 calls)
> Why does the new version assign the "HasNoChildren" attribute while the
> old version shows "HasChildren", and how do I fix this?
> 
> Yes, I have installed the latest stable version (cyrus-imapd-3.8.3) on a
> test server (which is quite painful since I have to build it and there are
> no SystemD init scripts; we much prefer to use standard operating system
> packages) and verified that there is no change in behavior.



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