[Postfixbuch-users] Exchange soll über Postfix versenden -> Relay access denied;

[Jens Weber]

Hallo,

ein Kunde würde gerne seinen Exchange mit meinem Mailserver verbinden. 
Abholen via Pop3 funktioniert, nur das versenden macht Probleme.

Wenn ich die IP eintrage in meine main.cf als mynetwork funktioniert 
alles. Nun ist aber das Problem das der Exchange nur eine dyndns-ip 
besitzt...

Fehler aus der Log:
NOQUEUE: reject: RCPT from p54B37A05.dip.t-dialin.net[84.179.122.5]: 554 
5.7.1 <info at xxxx.de>: Relay access denied; from=<xxx at xxx.de> 
to=<info at xxxx.de> proto=ESMTP helo=<xxx.net>

Meine Config:

postconf -n:
alias_database = hash:/etc/aliases
alias_maps = $alias_database
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/lib/postfix
default_destination_concurrency_limit = 20
inet_interfaces = all
local_destination_concurrency_limit = 2
mailbox_size_limit = 104857600
message_size_limit = 52428800
mydestination = $myhostname,    $mydomain,    localhost.$myhostname,    
localhost.$mydomain,    localhost
mydomain = h1767514.stratoserver.net
myhostname = h1767514.stratoserver.net
mynetworks = 127.0.0.0/8, die dyndnsip!
receive_override_options = no_address_mappings
relayhost =
sendmail_path = /usr/sbin/sendmail
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_client_restrictions = permit_mynetworks,    
permit_sasl_authenticated,    reject_unknown_client
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_sasl_authenticated,        
permit_mynetworks,    reject_unauth_destination,
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain =
smtpd_sasl_security_options = noanonymous
smtpd_sender_restrictions = permit_mynetworks,    
permit_sasl_authenticated,    reject_unknown_sender_domain
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual_alias_maps.cf
virtual_gid_maps = static:2000
virtual_mailbox_base = /var/customers/mail/
virtual_mailbox_domains = 
mysql:/etc/postfix/mysql-virtual_mailbox_domains.cf
virtual_mailbox_limit = 104857600
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual_mailbox_maps.cf
virtual_transport = dovecot
virtual_uid_maps = static:2000