Since I can't find a solution that works with my config, I lean on you guys to help me out with this.

I've installed postfix and dovecot on a CentOS server. Everything's running well. But when I try to send an e-mail from Outlook to tld that is not .com, server returns : Relay access denied.

Here's the result from the postconf -n command

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
home_mailbox = Maildir/
html_directory = no
inet_protocols = all
mailbox_size_limit = 104857600
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
message_size_limit = 20971520
mydestination = $myhostname, $mydomain, localhost, localhost.$mydomain
newaliases_path = /usr/bin/newaliases.postfix
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
sample_directory = /usr/share/doc/postfix-2.6.6/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_tls_loglevel = 3
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/postfix/mailserver.pem
smtpd_tls_key_file = /etc/postfix/mailserver.pem
smtpd_tls_received_header = yes
smtpd_tls_security_level = encrypt
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
unknown_local_recipient_reject_code = 550

Here's the maillog error :

Nov 23 13:26:24 website_name postfix/smtpd[16391]: extract_addr: input: <mrm@website_name.com>
Nov 23 13:26:24 website_name postfix/smtpd[16391]: smtpd_check_addr: addr=mrm@website_name.com
Nov 23 13:26:24 website_name postfix/smtpd[16391]: ctable_locate: move existing entry key mrm@website_name.com
Nov 23 13:26:24 website_name postfix/smtpd[16391]: extract_addr: in: <mrm@website_name.com>, result: mrm@website_name.com
Nov 23 13:26:24 website_name postfix/smtpd[16391]: fsspace: .: block size 4096, blocks free 23679665
Nov 23 13:26:24 website_name postfix/smtpd[16391]: smtpd_check_queue: blocks 4096 avail 23679665 min_free 0 msg_size_limit 20971520
Nov 23 13:26:24 website_name postfix/smtpd[16391]: > unknown[178.193.xxx.xxx]: 250 2.1.0 Ok
Nov 23 13:26:24 website_name postfix/smtpd[16391]: < unknown[178.193.xxx.xxx]: RCPT TO:<[email protected]>
Nov 23 13:26:24 website_name postfix/smtpd[16391]: extract_addr: input: <[email protected]>
Nov 23 13:26:24 website_name postfix/smtpd[16391]: smtpd_check_addr: [email protected]
Nov 23 13:26:24 website_name postfix/smtpd[16391]: ctable_locate: move existing entry key [email protected]
Nov 23 13:26:24 website_name postfix/smtpd[16391]: extract_addr: in: <[email protected]>, result: [email protected]
Nov 23 13:26:24 website_name postfix/smtpd[16391]: >>> START Recipient address RESTRICTIONS <<<
Nov 23 13:26:24 website_name postfix/smtpd[16391]: generic_checks: name=permit_sasl_authenticated
Nov 23 13:26:24 website_name postfix/smtpd[16391]: generic_checks: name=permit_sasl_authenticated status=0
Nov 23 13:26:24 website_name postfix/smtpd[16391]: generic_checks: name=reject_unauth_destination
Nov 23 13:26:24 website_name postfix/smtpd[16391]: reject_unauth_destination: [email protected]
Nov 23 13:26:24 website_name postfix/smtpd[16391]: permit_auth_destination: [email protected]
Nov 23 13:26:24 website_name postfix/smtpd[16391]: ctable_locate: leave existing entry key [email protected]
Nov 23 13:26:24 website_name postfix/smtpd[16391]: NOQUEUE: reject: RCPT from unknown[178.193.xxx.xxx]: 554 5.7.1 <[email protected]>: Relay access denied; from=<mrm@website_name.com> to=<[email protected]> proto=ESMTP helo=<[192.168.1.38]>
Nov 23 13:26:24 website_name postfix/smtpd[16391]: generic_checks: name=reject_unauth_destination status=2
Nov 23 13:26:24 website_name postfix/smtpd[16391]: > unknown[178.193.xxx.xxx]: 554 5.7.1 <[email protected]>: Relay access denied
Nov 23 13:26:24 website_name postfix/smtpd[16391]: smtp_get: EOF

What's wrong with this?

UPDATE : added to main.cf

broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous noplaintext
smtpd_sasl_tls_security_options = $smtpd_sasl_security_options
smtpd_sasl_type = dovecot

UPDATE : EHLO

EHLO mail.perflux.com
250-perflux.com
250-PIPELINING
250-SIZE 20971520
250-VRFY
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN