[Postfix-es] postfix como relay-host para exchange.

[Maximiliano Alonzo]

Hola lista:
Resulta que estoy poniendo un postfix como estfeta de 1 nivel y no puedo 
hacer que entregue los correos que recibe a un exchange como estafeta de 
2 nivel.
Ya cree la tabla de transport para el transport_map pero sigo teniendo 
problemas, quizas me puedan decir de algun documento que describa bien 
como poner en funcionamiento, ya he leido el tutorial de Limon pero no 
le doy con la vuelta.
Desde ya muy agradecido.
          Maxmiliano Alonzo

El error que me da es el siguiente:
    ...
    May 25 15:24:13 hp-admin postfix/smtpd[19663]: connect from 
unknown[192.168.20.3]
    May 25 15:24:13 hp-admin postfix/smtpd[19663]: BD38C451F20: 
client=unknown[192.168.20.3]
    May 25 15:24:13 hp-admin postfix/cleanup[19666]: BD38C451F20: 
message-id=<4294C2CD.7030709 en midominio.com.uy>
    May 25 15:24:13 hp-admin postfix/smtpd[19663]: disconnect from 
unknown[192.168.20.3]
    May 25 15:24:13 hp-admin postfix/qmgr[19659]: BD38C451F20: 
from=<malonzo en midominio.com.uy>, size=628, nrcpt=1 (queue active)
    May 25 15:24:14 hp-admin postfix/smtp[19667]: BD38C451F20: 
to=<gmartin en midominio.com.uy>, relay=none, delay=1, status=bounced (mail 
for midominio.com.uy loops back to myself)
    May 25 15:24:14 hp-admin postfix/cleanup[19666]: 16487451F22: 
message-id=<20050525182414.16487451F22 en mail.midominio.com.uy>
    May 25 15:24:14 hp-admin postfix/qmgr[19659]: 16487451F22: from=<>, 
size=2520, nrcpt=1 (queue active)
    May 25 15:24:14 hp-admin postfix/qmgr[19659]: BD38C451F20: removed
    May 25 15:24:14 hp-admin postfix/smtp[19667]: 16487451F22: 
to=<malonzo en midominio.com.uy>, relay=none, delay=0, status=bounced (mail 
for midominio.com.uy loops back to myself)
    May 25 15:24:14 hp-admin postfix/qmgr[19659]: 16487451F22: removed
    ...

Lo que me larga el postconf -n:
    alias_maps = hash:/etc/aliases
    canonical_maps = hash:/etc/postfix/canonical
    command_directory = /usr/sbin
    config_directory = /etc/postfix
    content_filter =
    daemon_directory = /usr/lib/postfix
    debug_peer_level = 2
    defer_transports =
    disable_dns_lookups = no
    html_directory = /usr/share/doc/packages/postfix/html
    inet_interfaces = 127.0.0.1 ::1
    mail_owner = postfix
    mail_spool_directory = /var/mail
    mailbox_command =
    mailbox_size_limit = 0
    mailbox_transport =
    mailq_path = /usr/bin/mailq
    manpage_directory = /usr/share/man
    masquerade_classes = envelope_sender, header_sender, header_recipient
    masquerade_domains =
    masquerade_exceptions = root
    message_size_limit = 10240000
    mydestination = $myhostname, localhost.$mydomain
    myhostname = hp-admin.eufores.com.uy
    newaliases_path = /usr/bin/newaliases
    queue_directory = /var/spool/postfix
    readme_directory = /usr/share/doc/packages/postfix/README_FILES
    relayhost =
    relocated_maps = hash:/etc/postfix/relocated
    sample_directory = /usr/share/doc/packages/postfix/samples
    sender_canonical_maps = hash:/etc/postfix/sender_canonical
    sendmail_path = /usr/sbin/sendmail
    setgid_group = maildrop
    smtp_sasl_auth_enable = no
    smtp_use_tls = no
    smtpd_client_restrictions =
    smtpd_helo_required = no
    smtpd_helo_restrictions =
    smtpd_recipient_restrictions = 
permit_mynetworks,reject_unauth_destination
    smtpd_sasl_auth_enable = no
    smtpd_sender_restrictions = hash:/etc/postfix/access
    smtpd_use_tls = no
    strict_rfc821_envelopes = no
    transport_maps = hash:/etc/postfix/transport
    unknown_local_recipient_reject_code = 450