[Dovecot] Operation not permitted

[André Labuschagné]

Hi all,

Slowly but surely moving forward, I hope...
I get the following error (in the maillog file) after I've installed 
Managesieve:
*Aug 13 10:13:52 li73-31 dovecot: deliver(andre at 
paranoidandroid.co.za): Fatal: setgid(501(paranoidandroid)) failed with 
euid=104(vmail), gid=106(vmail), egid=106(vmail): Operation not permitted*

/Does anybody know what this means and how to fix it?/

Don't know if it has anything to do with sieve (I've changed the 
/usr/etc/dovecot.conf file from mail_plugins = cmusieve to mail_plugins 
= sieve)

My config is below:

dovecot config:
----------------------
# 1.2.1: /usr/etc/dovecot.conf
# OS: Linux 2.6.18.8-x86_64-linode1 x86_64 CentOS release 5.3 (Final)
protocols: imap imaps pop3 pop3s
ssl_cert_file: /etc/pki/paranoidandroidCA/server.crt
ssl_key_file: /etc/pki/paranoidandroidCA/server.key
login_dir: /usr/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_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
auth default:
 mechanisms: plain login cram-md5 ntlm
 passdb:
  driver: sql
  args: /etc/dovecot/dovecot_sql_passdb.conf
 userdb:
  driver: sql
  args: /etc/dovecot/dovecot_sql_userdb.conf
 socket:
  type: listen
  client:
    path: /var/spool/postfix/private/auth
    mode: 432
    user: postfix
    group: postfix
  master:
    path: /usr/var/run/dovecot/auth-master
    mode: 384
    user: vmail

postfix config:
--------------------
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
header_checks = regexp:/etc/postfix/header_checks
html_directory = no
inet_interfaces = all
local_recipient_maps = $alias_maps $virtual_mailbox_maps unix:passwd.byname
mail_owner = postfix
mailq_path = /usr/bin/mailq
manpage_directory = /usr/local/man
mydestination = localhost
mydomain = paranoidandroid.co.za
myhostname = mail.paranoidandroid.co.za
mynetworks_style = host
myorigin = $myhostname
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = no
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_recipient_limit = 500
smtpd_recipient_restrictions = permit_mynetworks, 
permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_type = dovecot
unknown_local_recipient_reject_code = 550
virtual_alias_maps = 
proxy:mysql:/etc/postfix/sql/mysql_virtual_alias_maps.cf
virtual_mailbox_base = /
virtual_mailbox_domains = 
proxy:mysql:/etc/postfix/sql/mysql_virtual_domains_maps.cf
virtual_mailbox_maps = 
proxy:mysql:/etc/postfix/sql/mysql_virtual_mailbox_maps.cf
virtual_transport = dovecot

master.cf:
-------------
pickup    fifo  n       -       n       60      1       pickup
cleanup   unix  n       -       n       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
#qmgr     fifo  n       -       n       300     1       oqmgr
tlsmgr    unix  -       -       n       1000?   1       tlsmgr
rewrite   unix  -       -       n       -       -       trivial-rewrite
bounce    unix  -       -       n       -       0       bounce
defer     unix  -       -       n       -       0       bounce
trace     unix  -       -       n       -       0       bounce
verify    unix  -       -       n       -       1       verify
flush     unix  n       -       n       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
proxywrite unix -       -       n       -       1       proxymap
smtp      unix  -       -       n       -       -       smtp
relay     unix  -       -       n       -       -       smtp
  -o smtp_fallback_relay=
showq     unix  n       -       n       -       -       showq
error     unix  -       -       n       -       -       error
retry     unix  -       -       n       -       -       error
discard   unix  -       -       n       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       n       -       -       lmtp
anvil     unix  -       -       n       -       1       anvil
scache    unix  -       -       n       -       1       scache
dovecot   unix  -       n       n       -       -       pipe flags=DRhu 
user=vmail:vmail argv=/usr/lib/dovecot/deliver -d ${recipient}