[Dovecot] Unknown quota backend / imap dump-capability process returned 89

[Frank Elsner]

Hi all,

I want to use maildir++ quota with dovecot but when starting I get:

> service dovecot start
Starting IMAP-Service (dovecot 1.1.7)
ILoading modules from directory: /usr/dovecot/lib/dovecot/imap
IModule loaded: /usr/dovecot/lib/dovecot/imap/lib10_quota_plugin.so
IModule loaded: /usr/dovecot/lib/dovecot/imap/lib11_imap_quota_plugin.so
IModule loaded: /usr/dovecot/lib/dovecot/imap/lib20_mail_log_plugin.so
IEffective uid=65534, gid=65534, home=/tmp
FUnknown quota backend: 0
Error: imap dump-capability process returned 89
Fatal: Invalid configuration in /usr/local/dovecot/etc/dovecot.conf


> dovecot -n
# 1.1.7: /usr/local/dovecot/etc/dovecot.conf
# OS: Linux 2.6.27 i686 Fedora Core release 6 (Zod) ext3
base_dir: /var/run/dovecot/
ssl_cert_file: /usr/local/etc/seymour.crt
ssl_key_file: /usr/local/etc/seymour.key
disable_plaintext_auth: no
login_dir: /var/run/dovecot//login
login_executable: /usr/dovecot/libexec/dovecot/imap-login
login_greeting: c64.shuttle.de - Dovecot ready.
login_log_format_elements: %u %r %c
mail_max_userip_connections: 25
verbose_proctitle: yes
first_valid_uid: 100
last_valid_uid: 65534
mail_location: maildir:/var/mail/%u:INDEX=MEMORY
mail_debug: yes
maildir_copy_preserve_filename: yes
mail_executable: /usr/dovecot/libexec/dovecot/imap-quota
mail_plugins: mail_log quota imap_quota
mail_plugin_dir: /usr/dovecot/lib/dovecot/imap
mail_log_prefix: %Us(%u,%r): 
mail_log_max_lines_per_sec: 0
imap_client_workarounds: netscape-eoh tb-extra-mailbox-sep
imap_logout_format: [%i/%o]
auth default:
  executable: /usr/dovecot/libexec/dovecot/dovecot-auth
  master_user_separator: /
  count: 2
  passdb:
    driver: pam
    args: dovecot
  passdb:
    driver: passwd-file
    args: /usr/dovecot/etc/masters
  userdb:
    driver: passwd
plugin:
  quota: maildir:INBOX
  mail_log_events: delete undelete expunge copy mailbox_delete


The "mail_executable: /usr/dovecot/libexec/dovecot/imap-quota" currently reads:

| #!/bin/sh
| 
| /usr/bin/logger -p mail.info -t dovecot "imap-quota: Starting for $USER"
| 
| exec /usr/dovecot/libexec/dovecot/imap


In the future this procedure will provide QUOTA_RULESs per usr.


Any pointers welcome.

--Frank Elsner