Postfix Relay config

Moin,
ich bin gerade dabei zu Testzwecken eine komplette Serverlandschaft via Linux abzubilden. Der DC funktioniert ohne Probleme deshalb wollte ich mich jetzt dem Mailserver widmen. Habe auf einem neuen Server Postfix installiert und danach Dovecot. Auf einem Windows 7 Client habe ich Thunderbird installiert. Ich bin mittlerweile soweit das ich Mails verschicken aber nur intern. Jetzt habe ich versucht den Relayhost zu konfigurieren aber die Emails gehen nicht raus bzw. es kommen keine von außen rein (554 5.7.1 Recipient adress rejected: Access denied) Da ich noch nicht so wirklich viel Ahnung habe wäre ich über Hilfe sehr dankbar.

main.cf

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

#myorigin = /etc/mailname

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

1. appending .domain is the MUA's job.

append_dot_mydomain = no

1. Uncomment the next line to generate "delayed mail" warnings

#delay_warning_time = 4h

readme_directory = no

1. 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

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

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = mail.gtc.net
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = GTC.NET, MX01, localhost.localdomain, localhost,
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.121.0/24
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

1. appending .domain is the MUA's job.

append_dot_mydomain = no

1. Uncomment the next line to generate "delayed mail" warnings

#delay_warning_time = 4h

readme_directory = no

1. 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

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

mfg bolle01

smtpd_recipient_restrictions =
 check_recipient_access btree:/etc/postfix/access_recipients.rfc,
 check_recipient_access btree:/etc/postfix/access_recipients.user,
 reject_non_fqdn_sender,
 reject_non_fqdn_recipient,
 reject_unknown_recipient_domain,
 permit_mynetworks,
 check_policy_service inet:127.0.0.1:12525,
 permit_mx_backup,
 reject_unauth_destination,
 permit