Forum Linux.debian/ubuntu postfix tls+ courier auth +sasl + authentification sur le serveur smtp

bonjour, je veux configurer un smtp pour relayer les mails d'utilisateur qui s'authentifient sur celui-ci.
Ca ne marche pas
Le serveur me retourne toujours un :

postfix/smtpd[3894]: NOQUEUE: reject: RCPT from 88-137-34-117.adslgp.cegetel.net[88.137.34.117]: 554 5.7.1 <user@domain.tld>: Relay access denied; from=<user@domain2.tld> to=<user@domain.tld> proto=ESMTP helo=[192.168.2.27]

Lorsque je tente de m'authentifier avec thunderbird sur un client quelconque 192.168.2.27
J'ai voulu m'inspirer de http://linuxfr.org/forums/10/21717.html pour personnaliser mon main.cf, rien n'y fait.
Je le poste par dépit de bon sens:

smtp_banner = $myhostname ESMTP (Debian / GNU)
biff = no
disable_vrfy_command = yes
smtpd_helo_required = yes
append_dot_mydomain = no
mydestination = localhost, localhost.localdomain
mydomain = doimain.tld
myhostname = smtp.domain.tld
relayhost =
mynetworks = 127.0.0.0/8,213.251.178.0/24, sasl_authenticated
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,
permit_sasl_authenticated,
reject_non_fqdn_recipient

smtpd_client_restrictions =
reject_unknown_client,
permit_mynetworks

smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_use_tls = yes
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key


virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
virtual_mailbox_base = /var/spool/vlmail/
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_mailbox_limit = 51200000
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_transport = virtual

# Additional for quota support
virtual_create_maildirsize = yes
virtual_mailbox_extended = yes
virtual_mailbox_limit_maps = mysql:/etc/postfix/mysql_virtual_mailbox_limit_maps.cf
virtual_mailbox_limit_override = yes
virtual_maildir_limit_message = Sorry, the user's maildir has overdrawn his diskspace quota, please try again later.
virtual_overquota_bounce = yes

mon /etc/postfix/sasl/smtpd.conf

pwcheck_method: authdaemond
log_level: 3
authdaemond_path: /var/run/courier/authdaemon/socket
mech_list: plain login
allow_plaintext: true

Toute aide même infime est bienvenue o/
merci d'avance