Hello, After using Cyrus 2.1 for a few years I wanted to use a new Cyrus version on my new server. Although it is not yet marked as stable I downloaded version 2.3.3 and tried to connect to it with Thunderbird 1.5.0.2. The host system is a LFS 6.1 system. Although I set the altnamespace option in the imapd.conf file all folders are shown beneath the INBOX. When I checked the namespace options in Thunderbird it came up with these values: Personal namespace: "INBOX." Public namespace: "" Other users: "user." Comparing these values to my old Cyrus version (2.1.15) Personal namespace: "" Public namespace: "Public Folders." Other users: "Other Users." Creating folders in Thunderbird with the mailbox select (1 level higher than inbox) works but in cyradm these are created at root level, no prefix what so ever. I tried to set the sharedprefix and userprefix option but it did not help. Thunderbird configuration allows these settings to be taken over from server. But also disables and filling the 2.1.15 values does not solve the problem. Is this a bug of I am missing somehting here? Regards, Chris Wesdorp Current imapd.conf: # Begin /etc/imapd.conf configdirectory: /srv/cyrus/imap partition-default: /srv/cyrus/spool srvtab: /srv/cyrus/srvtab admins: root chris cyrus sasl_pwcheck_method: saslauthd sasl_mech_list: PLAIN sasl_minimum_layer: 0 allowanonymouslogin: no allowplaintext: yes altnamespace: yes sendmail: /usr/sbin/sendmail sievedir: /srv/cyrus/sieve hashimapspool: true tls_cert_file: /srv/cyrus/imap/server.pem tls_key_file: /srv/cyrus/imap/server.pem # End /etc/imapd.conf Output of listmailbox in cyradm as user cyrus: Mailpj1 (\HasNoChildren) Trash (\HasNoChildren) user.chris (\HasChildren) user.chris.Archief (\HasNoChildren) user.chris.Sent (\HasNoChildren) user.chris.Trash (\HasChildren) user.chris.Trash.test2 (\HasNoChildren) user.chris.test (\HasNoChildren) ---- Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html