[Postfix-es] Postfix error: name or service not known

[Alejandro Kurchis]

Dear all, I'm here again with more data in order to get help. I have a
mail server in DMZ1 which works perfectly sendind and receiving mails
to/from Internet. But we have a problem when we want to send mails to a
mail server in DMZ2 from the same LAN. My mail server is
mail.dmz1.com.ar and the other is mail.dmz2.com.ar (both are public)

The host mail.dmz2.com.ar exists in the local DNS pointing to a private
IP from DMZ2, in order to resolve the communication via LAN.

When I send a message from DMZ1 to DMZ2 I get this error:

The Postfix program

<juan en dmz2.com.ar>: [dmz2.com.ar]: Name or service not known

Here are the log, postconf -f and packages installed:

cat /var/log/mail.log:

Mar  2 09:14:02 mail1 postfix/pipe[8381]: 1615EEB52:
to=<juan en dmz2.com.ar>, relay=spamassassin, delay=6, status=sent
(mail.dmz1.com.ar)
Mar  2 09:14:02 mail1 amavis[8002]: (08002-01) Passed, <ale@> ->
<juen en dmz2.com.ar>, Message-ID: <45E81402.6060108 en midominio.com.ar>,
Hits: -2.4
Mar  2 09:14:02 mail1 postfix/smtp[8385]: 7981215AFF:
to=<juan en dmz2.com.ar>, relay=localhost[127.0.0.1], delay=0, status=sent
(250 2.6.0 Ok, id=08002-01, from MTA: 250 Ok: queued as A37C4242E4)
Mar  2 09:14:02 mail1 postfix/smtp[8389]: A37C4242E4:
to=<juan en dmz2.com.ar>, relay=none, delay=0, status=bounced
([dmz2.com.ar]: Name or service not known)

postconf -n:

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
content_filter = amavis-smtp:localhost:10024
inet_interfaces = 192.168.30.3
local_recipient_maps = unix:passwd.byname $alias_maps
local_transport = maildrop
mailbox_command = /usr/bin/maildrop -d $USER
mailbox_size_limit = 81200000
mydestination = localhost.dmz1.com.ar, localhost
myhostname = mail.dmz1.com.ar
mynetworks = 127.0.0.0/8, 192.1.1.0/24, 192.168.30.4/32, 10.10.12.100/32
myorigin = /etc/mailname
recipient_delimiter = +
relayhost =
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_client_restrictions = permit_mynetworks	reject_non_fqdn_recipient
reject_rbl_client sbl.spamhaus.org	reject_rbl_client opm.blitzed.org
reject_unauth_destination
virtual_gid_maps = static:5000
virtual_mailbox_base = /var/vmail/
virtual_mailbox_domains = $virtual_mailbox_maps
hash:/etc/postfix/vmaildomains
virtual_mailbox_maps = ldap:ldapvirtualmap
virtual_minimum_uid = 100
virtual_transport = virtual
virtual_uid_maps = static:5000


Postfix 2.1.5
Amavisd-new
Clamav
Spamassassin
Courier-imap-ssl

Any suggestion ??? I get lost......

Thanks in advance !!!

A.K.