Probleme postfix et squirrelmail

Bonjour, c'est urgent SVP aidez moi
ca fait deja 4 jours et g n progresse pas.

je suis entrein de mettre en place un serveur de messagerie g'utilise postfix ,procmail,courrierimap;squirrelmai.
losque j'envoie un mail en local mon serveur il ne ne va pa et mon serveur imap me repond:

Message not sent. Le serveur a répondu.

quand g regarde mes fichiers log g vois ceci:

Oct 2 12:51:50 le-mec-calme-19 imapd: Connection, ip=[::ffff:192.168.1.100]
Oct 2 12:51:50 le-mec-calme-19 imapd: LOGIN, user=michel, ip=[::ffff:192.168.1.100], port=[59072], protocol=IMAP
Oct 2 12:51:50 le-mec-calme-19 imapd: LOGOUT, user=michel, ip=[::ffff:192.168.1.100], headers=0, body=0, rcvd=87, sent=391, time=0
Oct 2 12:52:14 le-mec-calme-19 postfix/smtpd[3486]: fatal: bad numerical configuration: unknown_local_recipient_reject_code = 550 mynetworks_style = subnet
Oct 2 12:52:15 le-mec-calme-19 postfix/master[3223]: warning: process /usr/libexec/postfix/smtpd pid 3486 exit status 1
Oct 2 12:52:15 le-mec-calme-19 postfix/master[3223]: warning: /usr/libexec/postfix/smtpd: bad command startup --

voici la config du fichier main.cf :

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
default_destination_concurrency_limit = 10
default_privs = nobody
default_transport = smtp
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
inet_protocols = all
local_destination_concurrency_limit = 2
local_recipient_maps = $mydestination
mail_owner = postfix
mail_spool_directory = /var/spool/mail
mailbox_command = /usr/bin/procmail
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost, mail.$mydomain
mydomain = localdomain
myhostname = localhost.localdomain
mynetworks = 192.168.1.0/24, 127.0.0.0/8
myorigin = $myhostname
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.5.5/README_FILES
recipient_delimiter = +
relay_domains = $mydestination
relayhost = $mydomain
sample_directory = /usr/share/doc/postfix-2.5.5/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_banner = $myhostname ESMTP $mail_name ($mail_version)
unknown_local_recipient_reject_code = 550 mynetworks_style = subnet