[Dovecot] dovecot-deliver auth-master error

Hi all,

I'm trying to get the sieve plugin to work, but with little result. I'm following http://wiki.dovecot.org/LDA, http://wiki.dovecot.org/LDA/Postfix and http://wiki.dovecot.org/LDA/Sieve

but it won't work. As I have virtual users from several virtual domains, I added the "virtual users - with lookup" section from http://wiki.dovecot.org/LDA, but now dovecot fails to start.

My dovecot.conf is as follows:

# 1.0.13: /etc/dovecot.conf

login_dir: /var/run/dovecot/login

login_executable(default): /usr/libexec/dovecot/imap-login

login_executable(imap): /usr/libexec/dovecot/imap-login

login_executable(pop3): /usr/libexec/dovecot/pop3-login

mail_location: maildir:/data/mail/mydomain/%Ln

maildir_copy_with_hardlinks: yes

maildir_copy_preserve_filename: yes

mail_executable(default): /usr/libexec/dovecot/imap

mail_executable(imap): /usr/libexec/dovecot/imap

mail_executable(pop3): /usr/libexec/dovecot/pop3

mail_plugin_dir(default): /usr/lib/dovecot/imap

mail_plugin_dir(imap): /usr/lib/dovecot/imap

mail_plugin_dir(pop3): /usr/lib/dovecot/pop3

imap_client_workarounds(default): delay-newmail outlook-idle netscape-eoh

imap_client_workarounds(imap): delay-newmail outlook-idle netscape-eoh

imap_client_workarounds(pop3): outlook-idle

pop3_client_workarounds(default):

pop3_client_workarounds(imap):

pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh

auth default:

username_format: %Lu

debug: yes

debug_passwords: yes

passdb:

driver: ldap

args: /etc/dovecot-ldap.conf

userdb:

driver: static

args: uid=5000 gid=5000 home=/var/mail/vmail

socket:

type: listen

master:

  path: /var/run/dovecot/auth-master

  mode: 384

  user: vmail

  group: vmail

plugin:

sieve: /home/virtual/%u/sieve

The problem seems to be in the auth-master path, for /var/log/maillog shows:

Apr 14 16:14:44 termserv dovecot: Dovecot v1.0.13 starting up

Apr 14 16:14:44 termserv dovecot: auth(default): unlink(/var/run/dovecot/auth-master) failed: Is a directory

Apr 14 16:14:44 termserv dovecot: Auth process died too early - shutting down

Apr 14 16:14:44 termserv dovecot: child 12385 (auth) returned error 89

Can anyone point me in the right direction?

TIA,

Wouter