Spamd: handle_user unable to find user

Support Debian
#1

Bonjour à tous,

Je viens de mettre un système d’anti-spam sur un serveur mail, il fonctionne mais j’ai une erreur « spamd[21446]: spamd: handle_user unable to find user: ‘spamass-milter’ » à chaque message.

Voici ma config :

root@gozmail:~# cat /etc/default/spamass-milter 
# spamass-milt startup defaults

# OPTIONS are passed directly to spamass-milter.
# man spamass-milter for details

# Non-standard configuration notes:
# See README.Debian if you use the -x option with sendmail
# You should not pass the -d option in OPTIONS; use SOCKET for that.

# Default, use the spamass-milter user as the default user, ignore
# messages from localhost
#OPTIONS="-u spamass-milter -i 127.0.0.1"
OPTIONS="-u vmail -i 127.0.0.1"

# Reject emails with spamassassin scores > 15.
OPTIONS="-r 5"

# Do not modify Subject:, Content-Type: or body.
#OPTIONS="-m"

######################################
# If /usr/sbin/postfix is executable, the following are set by
# default. You can override them by uncommenting and changing them
# here.
######################################
# SOCKET="/var/spool/postfix/spamass/spamass.sock"
# SOCKETOWNER="postfix:postfix"
# SOCKETMODE="0660"
######################################
root@gozmail:~# cat /etc/default/spamassassin 
# /etc/default/spamassassin
# Duncan Findlay

# WARNING: please read README.spamd before using.
# There may be security risks.

# Change to one to enable spamd
ENABLED=1

# Options
# See man spamd for possible options. The -d option is automatically added.

# SpamAssassin uses a preforking model, so be careful! You need to
# make sure --max-children is not set to anything higher than 5,
# unless you know what you're doing.

#OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
OPTIONS="--create-prefs --max-children 5 --helper-home-dir --vpopmail --username=vmail --user-config"

# Pid file
# Where should spamd write its PID to file? If you use the -u or
# --username option above, this needs to be writable by that user.
# Otherwise, the init script will not be able to shut spamd down.
PIDFILE="/var/run/spamd.pid"

# Set nice level of spamd
#NICE="--nicelevel 15"

# Cronjob
# Set to anything but 0 to enable the cron job to automatically update
# spamassassin's rules on a nightly basis
CRON=1

Et voici une trace de log complète pour un mail :

Vous auriez une idée d’où ça peut venir ?