salut, merci pour ta réponse
Cela ne fonctionne toujours pas et je désespère totalement 
voici ma conf (dites moi si il manque quelques chose)
/etc/hostname
ksxxxxxx.kimsufi.com
/etc/hosts
127.0.0.1 localhost.localdomain localhost
111.222.333.444 ksxxxxxx.kimsufi.com ksxxxxxx
2001:41D0:8:46c3:: ksxxxxxx.kimsufi.com ksxxxxxx
# The following lines are desirable for IPv6 capable hosts
#(added automatically by netbase upgrade)
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
/etc/aliases
postmaster: root
root: mon_nom@mon_fai.com
/etc/mailname
multi on
ksxxxxxx.kimsufi.com
/etc/resolve.conf
nameserver 127.0.0.1
nameserver 111.222.333.444
search ovh.net
/etc/postfix/main.cf
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
biff = no
disable_vrfy_command = yes
smtpd_helo_required = yes
append_dot_mydomain = no
mydestination = ksxxxxxx.kimsufi.com, localhost, localhost.localdomain
mydomain = ksxxxxxx.kimsufi.com
myhostname = ksxxxxxx.kimsufi.com
relayhost =
mynetworks = 127.0.0.0/8 111.222.333.444
inet_interfaces = all
smtpd_sender_restrictions =
permit_mynetworks,
reject_unknown_sender_domain,
warn_if_reject,
reject_unverified_sender
smtpd_recipient_restrictions =
permit_mynetworks,
reject_unauth_destination,
reject_unknown_recipient_domain,
reject_non_fqdn_recipient
smtpd_client_restrictions =
reject_unknown_client,
permit_mynetworks
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual_aliases.cf, mysql:/etc/postfix/mysql-virtual_aliases_mailbox.cf
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_mailbox_base = /var/spool/vmail/
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
postfix check
pas d’erreur
host -t MX nom_domaine
nom_domaine.com mail is handled by 10 mail.nom_domaine.com.
mail -s sujet -r mon_nom@mon_fai.com postmaster@mon_nom_de_domaine
Dec 18 16:32:23 ks396941 postfix/pickup[10654]: C39C91380064: uid=0 from=<mon_nom@mon_fai.com>
Dec 18 16:32:23 ks396941 postfix/qmgr[10655]: C39C91380064: from=<mon_nom@mon_fai.com>, size=438, nrcpt=1 (queue active)
Dec 18 16:32:23 ks396941 postfix/virtual[13671]: C39C91380064: to=<postmaster@mon_nom_de_domaine.com>, relay=virtual, delay=0.14, delays=0.08/0.02/0/0.04, dsn=5.1.1, status=bounced (unknown user: "postmaster@mon_nom_de_domaine.com")
Dec 18 16:32:23 ks396941 postfix/bounce[13673]: C39C91380064: sender non-delivery notification: DAD131380066
Dec 18 16:32:23 ks396941 postfix/qmgr[10655]: DAD131380066: from=<>, size=2296, nrcpt=1 (queue active)
Dec 18 16:32:23 ks396941 postfix/qmgr[10655]: C39C91380064: removed
Dec 18 16:32:24 ks396941 postfix/smtp[13674]: DAD131380066: to=<mon_nom@mon_fai.com>, relay=smtp-in.orange.fr[80.12.242.9]:25, delay=0.21, delays=0.03/0.01/0.07/0.09, dsn=2.0.0, status=sent (250 2.0.0 V3YJ1p00f4D4g54013YJ3J mail accepted f$
Dec 18 16:32:24 ks396941 postfix/qmgr[10655]: DAD131380066: removed
est ce que unknown user: “postmaster@mon_nom_de_domaine.com” est un problème?
