Sorry für den Informationsmangel.
Ich hab das Standard image von netcup am laufen also Peostfix.
Leider weis ich mit der Seite von GMX nichts anzufangen. Ich kann nur vermuten, dass es etwas mit dem Hostname zu tun haben könnte.
Ich betreibe mehrere Domains auf dem Server.
main.cf
# Postfix programs paths settings
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
program_directory = /usr/lib/postfix
sendmail_path = /usr/sbin/sendmail
## General Postfix configuration
# should be the default domain from your provider eg. "server100.provider.tld"
mydomain = v220100968043xxx
# should be different from $mydomain eg. "mail.$mydomain"
myhostname = v220100968043xxx
mydestination = $myhostname,
$mydomain,
localhost.$myhostname,
localhost.$mydomain,
localhost
mynetworks = 127.0.0.0/8
inet_interfaces = all
append_dot_mydomain = no
biff = no
# Postfix performance settings
default_destination_concurrency_limit = 20
local_destination_concurrency_limit = 2
# SMTPD Settings
#smtpd_banner = $myhostname ESMTP $mail_name
smtpd_banner = $myhostname ESMTP Exchange Server 2003 (Microsoft Windows 2003)
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
reject_unauth_pipelining,
reject_non_fqdn_recipient
smtpd_sender_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_unknown_hostname,
reject_unknown_recipient_domain,
reject_unknown_sender_domain
smtpd_client_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_unknown_client
# Maximum size of Message in bytes (50MB)
message_size_limit = 52428800
## SASL Auth Settings
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
## Dovecot Settings for deliver, SASL Auth and virtual transport
## uncomment those line to use Dovecot
#mailbox_command = /usr/lib/dovecot/deliver
#virtual_transport = dovecot
#dovecot_destination_recipient_limit = 1
# Virtual delivery settings
virtual_mailbox_base = /var/customers/mail/
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual_mailbox_maps.cf
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual_mailbox_domains.cf
virtual_mailbox_limit = 0
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual_alias_maps.cf
virtual_uid_maps = static:2000
virtual_gid_maps = static:2000
# Local delivery settings
local_transport = local
alias_database = hash:/etc/aliases
alias_maps = $alias_database
# Default Mailbox size, is set to 0 which means unlimited!
mailbox_size_limit = 0
### TLS settings
###
## TLS for outgoing mails from the server to another server
smtp_use_tls = yes
smtp_tls_note_starttls_offer = yes
## TLS for email client
smtpd_use_tls = yes
smtpd_enforce_tls = yes
smtpd_tls_cert_file = /etc/postfix/smtpd.pem
smtpd_tls_key_file = /etc/postfix/smtpd.pem
#smtpd_tls_CAfile = /etc/postfix/smtpd.pem
#smtpd_tls_CAfile = /etc/ssl/cacert.class3.crt # Just an example for CACert.org
smtpd_tls_auth_only = no
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
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