hallo, 
leider hab ich seit gestern abend folgendes problem wenn ich mails an gmx und co mailen möchte.
Code:
Folgende Empfänger konnten nicht erreicht werden:
      'janko1000@gmx.de' am 18.12.2007 07:08
            504 5.5.2 <Janko>: Helo command rejected: need fully-qualified hostname
 
so ein problem hatte ich bisher noch nie vorher. 
postfix main.cf
Code:
#
# Postfix MTA Manager Main Configuration File;
#
# Please do NOT edit this file manually;
#
#
# Postfix directory settings; These are critical for normal Postfix MTA functionallity;
#
command_directory = /usr/sbin
daemon_directory  = /usr/lib/postfix
program_directory = /usr/lib/postfix
#
# Some common configuration parameters;
#
inet_interfaces  = all
mynetworks_style = host
smtp_bind_address = 78.47.121.137
myorigin = $mydomain
smtpd_banner =  ESMTP ispCP 1.0 Priamos Managed 1.0.0 RC3 OMEGA
setgid_group = postdrop
#
# Receiving messages parameters;
#
mydestination       = 
append_dot_mydomain = no
append_at_myorigin  = yes
local_transport     = local
virtual_transport   = virtual
transport_maps      = hash:/etc/postfix/ispcp/transport
#
# Delivering local messages parameters;
#
mail_spool_directory = /var/mail
# Mailboxquota
# => 0 for unlimited
# => 262144000 for 250 MB
mailbox_size_limit = 262144000
mailbox_command    = procmail -a "$EXTENSION"
biff = no
alias_database                    = hash:/etc/aliases
local_destination_recipient_limit = 1
local_recipient_maps              = unix:passwd.byname $alias_database
#
# ISPCP Autoresponder parameters;
#
ispcp-arpl_destination_recipient_limit = 1
#
# Delivering virtual messages parameters;
#
virtual_mailbox_base    = /var/mail/virtual
virtual_mailbox_limit   = 0
virtual_mailbox_domains = hash:/etc/postfix/ispcp/domains
virtual_mailbox_maps    = hash:/etc/postfix/ispcp/mailboxes
virtual_alias_maps      = hash:/etc/postfix/ispcp/aliases
virtual_minimum_uid     = 1000
virtual_uid_maps        = static:1000
virtual_gid_maps        = static:8
#
# SASL paramters;
#
smtpd_sasl_auth_enable       = yes
smtpd_sasl2_auth_enable      = yes
smtpd_sasl_security_options  = noanonymous, noplaintext
smtpd_sasl_local_domain      =
broken_sasl_auth_clients     = yes
smtpd_helo_required = yes
smtpd_helo_restrictions      = permit_mynetworks,
                               permit_sasl_authenticated,
                               reject_invalid_helo_hostname,
                               reject_non_fqdn_helo_hostname
smtpd_sender_restrictions    = reject_non_fqdn_sender,
                               reject_unknown_sender_domain,
                               permit_mynetworks,
                               permit_sasl_authenticated
smtpd_recipient_restrictions = reject_non_fqdn_recipient,
                               reject_unknown_recipient_domain,
                               permit_mynetworks,
                               permit_sasl_authenticated,
                               reject_unauth_destination,
                               reject_unlisted_recipient,
                               check_policy_service inet:127.0.0.1:12525,
                               check_policy_service inet:127.0.0.1:60000,
                               permit
smtpd_data_restrictions      = reject_multi_recipient_bounce,
                               reject_unauth_pipelining
#
# TLS parameters; activate, if avaible/used
#
#smtpd_tls_loglevel        = 2
#smtpd_tls_cert_file       = /etc/postfix/cert.pem
#smtpd_tls_key_file        = /etc/postfix/privkey.pem
#smtpd_use_tls             = yes
#smtpd_tls_auth_only       = no
#smtpd_tls_received_header = yes
#
# AMaViS parameters; activate, if available/used
#
#content_filter = amavis:[127.0.0.1]:10024
#
# Quota support; activate, if available/used
#
#virtual_create_maildirsize     = yes
#virtual_mailbox_extended       = yes
#virtual_mailbox_limit_maps     = mysql:/etc/postfix/mysql_virtual_mailbox_limit_maps.cf
#virtual_mailbox_limit_override = yes
#virtual_maildir_limit_message  = "The user you're trying to reach is over mailbox quota."
#virtual_overquota_bounce       = yes
 
/etc/hostname
/etc/hosts
Code:
# 'hosts' file configuration.
127.0.0.1 localhost
 
ich weiß leider nicht wo sonst noch der fehler sitzen könnte.
mails empfangen ist kein problem.
mfg
sebastian