POSTFIX RELAY DENIED

J'ai reinstallé mon serveur de mail, en suivant le meme tutoriel que j'avais avant et reproduisant les meme fichiers de conf.
Voici d'ailleur une copie de mon main.cf de postfix.

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
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

# 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:${queue_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${queue_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 = my.hostname.com
alias_maps = hash:/etc/aliases
virtual_maps = hash:/etc/postfix/virtual/addresses
alias_database = hash:/etc/aliases
mydomain = hostname.com
mydestination = my.hostname.com, localhost.hostname.com, localhost, /etc/postfix/virtual/domains
#relayhost = 127.0.0.0/8
mynetworks = 127.0.0.0/8,xxx.xxx.xxx.xxx #mon ip
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

Pourtant tous les messages envoyé reviennent avec une erreur RELAY DENIED et voici ce que je recois dans mes logs:

Nov 21 20:26:04 ks201982 postfix/smtpd[21597]: connect from yw-out-1718.google.com[74.125.46.155]
Nov 21 20:26:04 ks201982 postfix/smtpd[21597]: NOQUEUE: reject: RCPT from yw-out-1718.google.com[74.125.46.155]: 554 5.7.1 <user@domain.com>: Relay access denied; from=<jojolapin972@gmail.com> to=<user@domain.com> proto=ESMTP helo=<yw-out-1718.google.com>
Nov 21 20:26:04 ks201982 postfix/smtpd[21597]: disconnect from yw-out-1718.google.com[74.125.46.155]
Nov 21 20:29:24 ks201982 postfix/anvil[21231]: statistics: max connection rate 1/60s for (smtp:194.140.247.101) at Nov 21 20:19:58
Nov 21 20:29:24 ks201982 postfix/anvil[21231]: statistics: max connection count 1 for (smtp:194.140.247.101) at Nov 21 20:19:58
Nov 21 20:29:24 ks201982 postfix/anvil[21231]: statistics: max cache size 2 at Nov 21 20:26:04

Le probleme c'est que l'adresse Ip de la machine fait partir des IP authorisée.