[Postfix-es] Error al recivir mail

[David González Romero]

Hola amigos!!!

Tengo un CentOS 3.5 con Postfix 2.0.16-14.RHEL3 y uso
Amavis-New+Clamav+Spamassasain, aunque este ultimo no funciona del
todo bien aun. Mi configuracion es esta:

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
default_destination_concurrency_limit = 10
inet_interfaces = all
local_destination_concurrency_limit = 2
local_recipient_maps = $alias_maps unix:passwd.byname
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
maximal_queue_lifetime = 5d
mydestination = $myhostname localhost.$myhostname $mydomain
mydomain = cuba-e.net
myhostname = mx1.cuba-e.net
mynetworks = 127.0.0.0/8, 200.55.136.138, 64.251.27.73, 200.55.173.192/29
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
notify_classes = resource, software, policy
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.1.5/README_FILES
relay_domains = $mydomain $transport_maps
relay_recipient_maps = hash:/etc/postfix/real_users
sample_directory = /usr/share/doc/postfix-2.1.5/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_banner = $myhostname ESMTP
smtpd_client_restrictions = reject_unknown_client
smtpd_helo_required = yes
smtpd_helo_restrictions = reject_invalid_hostname       
reject_unknown_hostname        reject_non_fqdn_hostname
smtpd_recipient_restrictions = permit_mynetworks        check_relay_domains
transport_maps = hash:/etc/postfix/transport
unknown_local_recipient_reject_code = 550

Y me estoy encontrando con estos mensajes de error de mi server, y se
que los clientes son reales. Que puede pasar?

Transcript of session follows.

 Out: 220 mx1.dom.net ESMTP
 In:  EHLO mail1.ing.cl
 Out: 250-mx1.dom.net
 Out: 250-PIPELINING
 Out: 250-SIZE 10240000
 Out: 250-VRFY
 Out: 250-ETRN
 Out: 250 8BITMIME
 In:  MAIL FROM:<teresita.Rojas en ing.cl> SIZE=25104
 Out: 250 Ok
 In:  RCPT TO:<pedrito en dom.net>
 Out: 450 Client host rejected: cannot find your hostname, [164.77.246.178]
 In:  RSET
 Out: 250 Ok
 In:  QUIT
 Out: 221 Bye

Saludos,
David