Hola amigos del foro!!! estoy teniendo el sigte!! problema!!!

a la Hora de recibir los email todo funciona de maravilla de culquier dominio externo como del mismo dominio!!
el problema es a la hora de enviar todos los envios a dominios externos retorna!! generando el sgte erro!!!

Reporting-MTA: dns; mail.palmartextil.com.py
X-Postfix-Queue-ID: B5BEA135C593
X-Postfix-Sender: rfc822; paul@palmartextil.com.py
Arrival-Date: Thu, 29 May 2008 21:49:08 -0400 (PYT)

Final-Recipient: rfc822; p_alejandro91@hotmail.com
Original-Recipient: rfc822;p_alejandro91@hotmail.com
Action: failed
Status: 5.4.6
Diagnostic-Code: X-Postfix; mail for [200.3.248.xxx] loops back to myself

el log es el sgte!!!

May 29 21:32:09 ns1 postfix/smtpd[17374]: warning: 200.3.248.xxx: address not listed for hostname ns1.palmartextil.com.py
May 29 21:32:09 ns1 postfix/smtp[17386]: warning: host 200.3.248.xxx[200.3.248.xxx]:25 greeted me with my own hostname mail.palmartextil.com.py
May 29 21:32:09 ns1 postfix/smtp[17386]: warning: host 200.3.248.xxx[200.3.248.xxx]:25 replied to HELO/EHLO with my own hostname mail.palmartextil.com.py
May 29 21:49:06 ns1 postfix/smtpd[17954]: warning: 200.3.248.xxx: address not listed for hostname ns1.palmartextil.com.py
May 29 21:49:08 ns1 postfix/smtpd[17954]: warning: 200.3.248.xxx: address not listed for hostname ns1.palmartextil.com.py
May 29 21:49:08 ns1 postfix/smtp[17964]: warning: host 200.3.248.xxx[200.3.248.xxx]:25 greeted me with my own hostname mail.palmartextil.com.py
May 29 21:49:08 ns1 postfix/smtp[17964]: warning: host 200.3.248.250[200.3.248.xxx]:25 replied to HELO/EHLO with my own hostname mail.palmartextil.com.py

main.cf
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no
append_dot_mydomain = no

myhostname = mail.palmartextil.com.py
local_recipient_maps = $alias_maps $virtual_mailbox_maps
mydomain = palmartextil.com.py
mydestination = mail.palmartextil.com.py
home_mailbox = Maildir/
relayhost =
mynetworks = 127.0.0.0/8, 192.168.1.0/24
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

smtpd_sasl_local_domain =
smtpd_sasl_auth_enable = yes
smtpd_sasl2_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes

smtp_use_tls = yes
smtpd_use_tls = yes
smtpd_tls_auth_only = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
smtpd_tls_cert_file = /etc/ssl/certs/smtpd.crt
smtpd_tls_key_file = /etc/ssl/private/smtpd.key
smtpd_tls_auth_only = no
smtpd_tls_CAfile = /etc/ssl/certs/cacert.pem
tls_random_source = dev:/dev/urandom

alias_maps = mysql:/etc/postfix/mysql-aliases.cf
relocated_maps = mysql:/etc/postfix/mysql-relocated.cf
transport_maps = mysql:/etc/postfix/mysql-transport.cf
virtual_transport = virtual
virtual_mailbox_domains = palmartextil.com.py
#mysql:/etc/postfix/mysql-virtual-domains.cf
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-aliases.cf
virtual_mailbox_base = /usr/local/vmail
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-maps.cf
virtual_minimum_uid = 100
virtual_uid_maps = static:2005
virtual_gid_maps = static:2005

masquerade_domains = palmartextil.com.py
masquerade_exceptions = root
smtpd_helo_required = yes
disable_vrfy_command = yes
strict_rfc821_envelopes = yes
invalid_hostname_reject_code = 554
multi_recipient_bounce_reject_code = 554
non_fqdn_reject_code = 554
relay_domains_reject_code = 554
unknown_address_reject_code = 554
unknown_client_reject_code = 554
unknown_hostname_reject_code = 554
unknown_local_recipient_reject_code = 554
nknown_relay_recipient_reject_code = 554
unknown_sender_reject_code = 554
unknown_virtual_alias_reject_code = 554
unknown_virtual_mailbox_reject_code = 554
unverified_recipient_reject_code = 554
unverified_sender_reject_code = 554

smtpd_recipient_restrictions =
reject_invalid_hostname,
reject_unknown_recipient_domain,
reject_unauth_pipelining,
permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
reject_rbl_client multi.uribl.com,
reject_rbl_client dsn.rfc-ignorant.org,
reject_rbl_client dul.dnsbl.sorbs.net,
reject_rbl_client list.dsbl.org,
reject_rbl_client bl.spamcop.net,
reject_rbl_client dnsbl.sorbs.net,
reject_rbl_client cbl.abuseat.org,
reject_rbl_client ix.dnsbl.manitu.net,
reject_rbl_client combined.rbl.msrbl.net,
reject_rbl_client rabl.nuclearelephant.com,
permit

smtpd_data_restrictions = reject_unauth_pipelining
smtpd_etrn_restrictions = reject
delay_warning_time = 4h
maximal_queue_lifetime = 7d
smtp_helo_timeout = 60s
smtpd_recipient_limit = 16
mtpd_soft_error_limit = 3
smtpd_hard_error_limit = 12

disable_dns_lookups = no
notify_classes = resource, software
content_filter=smtp-amavis:[127.0.0.1]:10024
readme_directory = /usr/share/doc/postfix
html_directory = /usr/share/doc/postfix/html
myorigin = /etc/mailname
inet_protocols = all

y el dns!!!

;
; BIND data file for local loopback interface
;
$TTL 604800
@ IN SOA palmartextil.com.py. paul.palmartextil.com.py. (
3 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
palmartextil.com.py. IN NS ns1.palmartextil.com.py.
palmartextil.com.py. IN NS ns2.personal.net.py.
palmartextil.com.py. IN MX 10 ns1.palmartextil.com.py.
palmartextil.com.py. IN MX 20 ns2.personal.net.py.

palmartextil.com.py. IN A 200.3.248.xxx
localhost IN A 127.0.0.1

ns1 IN A 200.3.248.xxx
ns2 IN A 200.3.250.x

www IN CNAME ns1
mail IN CNAME ns1

el postfix esta corriendo detraz de un router(IP publica) con los puertos correctamente direccionados en la 192.168.1.7

les agradeceria si alguien me pudiera ayudar a resolver este problema!!!!!!!!!!