[PLUTO-help] Postifix errore invio messaggio

[Pignedoli Luca]

Ciao a tutti, sono ancora qui a tediarvi con la configurazione di postfix.

Sul server ho un messaggio in coda che non riesce a "smaltire":

#mailq

-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
99F69185E7      582 Wed Jul  6 17:39:56  xxxxx a mydomain.it
(Host or domain name not found. Name service error for name=mecsud.it
type=MX: Host not found, try again) info a mecsud.it

Ho provato a risolvere il dominio mecsud.it con dig ed in effetti non
esiste.

Quello che non capisco e':

1) Perche' postfix continua a tenerlo in coda pur avendo impostato
bounce_queue_lifetime = 0?

2) Perche' non ha avvisato l'utente che non esiste il dominio?

Ho sbagliato qualche impostazione?

Questa e' la configurazione:

program_directory = /usr/lib/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
cyrus_destination_recipient_limit=1
sendmail_path = /usr/sbin/sendmail
newaliases_path = /usr/bin/newaliases
mailq_path = /usr/bin/mailq
setgid_group = maildrop
html_directory = /usr/share/doc/packages/postfix/html
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/packages/postfix/samples
readme_directory = /usr/share/doc/packages/postfix/README_FILES
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
mail_owner = postfix
default_privs = nobody
myhostname = mail.xxx.xx
mydomain = xxx.xx
myorigin = $mydomain
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, localhost
unknown_local_recipient_reject_code = 550
mynetworks_style = subnet
mynetworks = 127.0.0.0/8
local_recipient_maps = ldap:/etc/postfix/ldapmail.cf
transport_maps = hash:/etc/postfix/transport
alias_maps = ldap:/etc/postfix/ldapalias.cf, hash:/etc/aliases
recipient_delimiter = ;
mail_spool_directory = /var/mail
message_size_limit = 200000000
debug_peer_level = 2
debugger_command =
         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
         xxgdb $daemon_directory/$process_name $process_id & sleep 5
#MailBox
home_mailbox = Maildir/
mailbox_command = /usr/lib/cyrus/bin/deliver
mailbox_transport = lmtp:unix:public/lmtp
mailbox_size_limit = 0
lmtp_cache_connection = NO
#Virtual
virtual_transport = lmtp:unix:public/lmtp
virtual_alias_maps = ldap:/etc/postfix/ldapalias.cf, hash:/etc/aliases
virtual_maps = ldap:/etc/postfix/ldapmail.cf
virtual_mailbox_base =/
virtual_mailbox_maps=ldap:/etc/postfix/ldapaccount.cf
virtual_mailbox_domains=ldap:/etc/postfix/ldapvdomains.cf
#SMTPD
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_reject_unlisted_sender = yes
unverified_sender_reject_code = 550
unknown_address_reject_code=450
smtpd_helo_required = yes
smtpd_helo_required = yes
smtpd_sasl_auth_enable=yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain=$mydomain
broken_sasl_auth_clients = yes
smtpd_sasl_application_name = smtpd
smtpd_restriction_classes = local_only, ext_mail
local_only=check_recipient_access hash:/etc/postfix/local_domains,
 reject
ext_mail=permit_sasl_authenticated
smtpd_recipient_restrictions =
 check_sender_access hash:/etc/postfix/restricted_senders,
 permit_mynetworks,
 permit_sasl_authenticated,
 reject_unauth_destination,
 reject_unverified_recipient
#TLS
smtpd_tls_auth_only = no
smtpd_use_tls = yes
smtpd_tls_key_file = /etc/postfix/cert/serverkey.pem
smtpd_tls_cert_file = /etc/postfix/cert/servercert.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
smtp_use_tls = yes
smtp_tls_note_starttls_offer = yes
bounce_queue_lifetime = 0
#Spam
biff = no
empty_address_recipient = MAILER-DAEMON


Grazie per l'aiuto.

Ciao