Emails von knuddels.de werden nicht entgegen genommen

[Mericon]

Hallo da sich vor 2 Tagen jemand der eine email bei mir hat gemeldet hat das emails vom Chat knuddels.de nicht ankommen habe ich versucht das problem zu lösen aber werde aus dem fehler in der mail.log und mail.warn nicht ganz schlau.

ich hoffe ihr könnt mir helfen.

(kann den eigenen hostnamen nicht ändern aber reverse eintrag is vorhanden)

eintrage aus der:
mail.warn

Jun 16 06:11:10 clients postfix/smtpd[2971]: warning: unknown[218.20.133.132]: SASL LOGIN authentication failed: authentication failure
Jun 16 06:26:09 clients postfix/local[18778]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled


einträge aus der:
mail.log

Jun 16 01:31:45 clients postfix/smtpd[27306]: connect from chat.knuddels.de[213.61.5.150]
Jun 16 01:31:45 clients postfix/smtpd[27306]: NOQUEUE: reject: RCPT from chat.knuddels.de[213.61.5.150]: 504 5.5.2 <Opteron2>: Helo command rejected: need fully-qualified hostname; from=<James@knuddels.de> to=<knutschbaerchen@dj-mericon.de> proto=ESMTP helo=<Opteron2>
Jun 16 01:31:45 clients postfix/smtpd[27306]: disconnect from chat.knuddels.de[213.61.5.150]


meine
main.cf


#
# 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;
#

mynetworks_style = host


mydomain = mail.dj-mericon.de
myorigin = $mydomain


smtpd_banner = $myhostname ESMTP ispCP 1.0 Priamos Managed 1.0.0 RC4 OMEGA
setgid_group = postdrop

#
# Receiving messages parameters;
#

mydestination = $myhostname, $mydomain
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
# => 104857600 for 100 MB
mailbox_size_limit = 204857600
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
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,
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


schonmal vielen dank