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j'ai installé postfix sur mon serveur mais je n'arrive pas à envoyer des mails entres les utilisateur crées dans le serveur

SVP si quelqu'un peut m'aider et vérifier avec moi ma configuration de postfix

voila mon fichier de confihuration postfix:
# See /usr/share/postfix/main.cf.dist for a commented, more complete version

# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = asntanger
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = asntanger.asn, asntanger, localhost.localdomain, localhost
relayhost =
mynetworks = 192.168.2.0/24, 127.0.0.0/8
mailbox_size_limit = 51200000
recipient_delimiter = +
inet_interfaces = loopback-only
default_transport = error
relay_transport = error
inet_protocols = ipv4

est-ce que quelqu'un peut m'aider pour configurer postfix

bonjour tout le monde , et bien je suis arrivée à envoyer des mails entre les utilisateurs que j'ai créé dans le serveur mais en mode console ,mais quand je veux envoyer des mails avec évolution il me donne un message d'erreur "impossible de se connecter à asntanger : connexion refusée" voici le résultat de la commande postconf -n :
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
default_transport = error
inet_interfaces = loopback-only
inet_protocols = ipv4
mailbox_size_limit = 51200000
mydestination = asntanger, asntanger.asn, localhost.localdomain, localhost
myhostname = asntanger
mynetworks = 192.168.2.0/24, 127.0.0.0/8
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relay_transport = error
relayhost =
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes

merci bien.

Bonjour j'ai installé cyrus-imapd-2.2 alors voici le contenu du fichier /etc/cyrus.conf:
# Debian defaults for Cyrus IMAP server/cluster implementation
# see cyrus.conf(5) for more information
#
# All the tcp services are tcpd-wrapped. see hosts_access(5)
# $Id: cyrus.conf 567 2006-08-14 18:19:32Z sven $

START {
# do not delete this entry!
recover cmd="/usr/sbin/ctl_cyrusdb -r"

# this is only necessary if idlemethod is set to "idled" in imapd.conf
#idled cmd="idled"

# this is useful on backend nodes of a Murder cluster
# it causes the backend to syncronize its mailbox list with
# the mupdate master upon startup
#mupdatepush cmd="/usr/sbin/ctl_mboxlist -m"

# this is recommended if using duplicate delivery suppression
delprune cmd="/usr/sbin/cyr_expire -E 3"
# this is recommended if caching TLS sessions
tlsprune cmd="/usr/sbin/tls_prune"
}

# UNIX sockets start with a slash and are absolute paths
# you can use a maxchild=# to limit the maximum number of forks of a service
# you can use babysit=true and maxforkrate=# to keep tight tabs on the service
# most services also accept -U (limit number of reuses) and -T (timeout)
SERVICES {
# --- Normal cyrus spool, or Murder backends ---
# add or remove based on preferences
imap cmd="imapd -U 30" listen="imap" prefork=0 maxchild=100
imaps cmd="imapd -s -U 30" listen="imaps" prefork=0 maxchild=100
pop3 cmd="pop3d -U 30" listen="pop3" prefork=0 maxchild=50
pop3s cmd="pop3d -s -U 30" listen="pop3s" prefork=0 maxchild=50
nntp cmd="nntpd -U 30" listen="nntp" prefork=0 maxchild=100
#nntps cmd="nntpd -s -U 30" listen="nntps" prefork=0 maxchild=100

# At least one form of LMTP is required for delivery
# (you must keep the Unix socket name in sync with imap.conf)
#lmtp cmd="lmtpd" listen="localhost:lmtp" prefork=0 maxchild=20
lmtpunix cmd="lmtpd" listen="/var/run/cyrus/socket/lmtp" prefork=0 maxchild=20
# ----------------------------------------------

# useful if you need to give users remote access to sieve
# by default, we limit this to localhost in Debian
sieve cmd="timsieved" listen="localhost:sieve" prefork=0 maxchild=100

# this one is needed for the notification services
notify cmd="notifyd" listen="/var/run/cyrus/socket/notify" proto="udp" prefork=1

# --- Murder frontends -------------------------
# enable these and disable the matching services above,
# except for sieve (which deals automatically with Murder)

# mupdate database service - must prefork at least 1
# (mupdate slaves)
#mupdate cmd="mupdate" listen=3905 prefork=1
# (mupdate master, only one in the entire cluster)
#mupdate cmd="mupdate -m" listen=3905 prefork=1

# proxies that will connect to the backends
imap cmd="proxyd" listen="imap" prefork=0 maxchild=100
imaps cmd="proxyd -s" listen="imaps" prefork=0 maxchild=100
#pop3 cmd="pop3proxyd" listen="pop3" prefork=0 maxchild=50
#pop3s cmd="pop3proxyd -s" listen="pop3s" prefork=0 maxchild=50
#lmtp cmd="lmtpproxyd" listen="lmtp" prefork=1 maxchild=20
# ----------------------------------------------
}

EVENTS {
# this is required
checkpoint cmd="/usr/sbin/ctl_cyrusdb -c" period=30

# this is only necessary if using duplicate delivery suppression
delprune cmd="/usr/sbin/cyr_expire -E 3" at=0401

# this is only necessary if caching TLS sessions
tlsprune cmd="/usr/sbin/tls_prune" at=0401

# indexing of mailboxs for server side fulltext searches

# reindex changed mailboxes (fulltext) approximately every other hour
#squatter_1 cmd="/usr/bin/nice -n 19 /usr/sbin/squatter -s" period=120

# reindex all mailboxes (fulltext) daily
#squatter_a cmd="/usr/sbin/squatter" at=0517
}

merci bien de vouloir m'aider ,vraiment je suis besoin de votre aide.

Salut je veux savoir comment savoir que le serveur cyrus fonctionne bien
Merci