Error postfix/ldap - Temporary lookup failure

Hola,

Desde anoche estoy teniendo problemas con un server de mail, el tema es que no esta entregando correos, pero si recibe.

A alguien le ha pasado?

220 firewall ESMTP Postfix (Debian/GNU)
helo server
250 firewall
mail from:admin@localhost
250 2.1.0 Ok
rcpt to:root@localhost.interno
451 4.3.0 <root@localhost.interno>: Temporary lookup failure

postconf -n

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
default_transport = error
inet_interfaces = all
inet_protocols = ipv4
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
mydestination = localhost.interno, localhost
myhostname = lenny
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 172.21.0.0/24
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relay_transport = error
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
virtual_alias_maps = ldap:vlocal

Logs:

Sep 29 10:46:12 firewall dovecot: POP3(test1): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
Sep 29 10:46:18 firewall postfix/smtpd[8808]: connect from unknown[172.21.0.1]
Sep 29 10:46:29 firewall dovecot: pop3-login: Login: user=<test1>, method=PLAIN, rip=172.21.0.26, lip=172.21.0.152
Sep 29 10:46:29 firewall dovecot: POP3(test1): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
Sep 29 10:46:30 firewall dovecot: pop3-login: Login: user=<test3>, method=PLAIN, rip=172.21.0.22, lip=172.21.0.152
Sep 29 10:46:30 firewall dovecot: POP3(test3): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0

puertos

tcp        0      0 0.0.0.0:110             0.0.0.0:*               LISTEN      8153/dovecot

tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN      8123/master

tcp        0      0 0.0.0.0:995             0.0.0.0:*               LISTEN      8153/dovecot
tcp        0      0 0.0.0.0:389             0.0.0.0:*               LISTEN      8180/slapd

--

Marcos Germán Capelari
Teléfono: (+54) 0351 - 4281906
Móvil: (+54) 0351 - 152505843
Córdoba - Argentina

Mail/Msn: marcoscapelari@gmail.com