Hi everyone, lately I noticed that sometimes Postfix seems to ignore the pr=sence of a .forward file in the user folder, and so hands out the message =o the lmtpunix delivery program, which doesn't find a cyrus mailbox folder=and replies to the sender that the user is not known with 550-Mailbox unkn=wn. Does everybody have any suggestion? Thanks in advance R. Following I attached the error and the main.cf Apr 12 11:27:30 mail postfix/lmtp[7321]: AF0F41EDBD2: to=<[email protected]=>, orig_to=<[email protected]>, relay=mail.MYDOMAIN.com[/var/lib/im=p/socket/lmtp], delay=0.2, delays=0.12/0/0.02/0.05, dsn=5.1.1, statu==bounced (host mail.MYDOMAIN.com[/var/lib/imap/socket/lmtp] said: 550-Ma=lbox unknown. Either there is no mailbox associated with this 550-name or=you do not have authorization to see it. 550 5.1.1 User unknown (in reply =o RCPT TO command)) alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix content_filter = filter:127.0.0.1:10025 daemon_directory = /usr/libexec/postfix debug_peer_level = 10 disable_vrfy_command = yes header_checks = regexp:/etc/postfix/header_checks html_directory = no inet_interfaces = localhost, thismail local_destination_concurrency_limit = 10 local_destination_recipient_limit = 300 mail_owner = postfix mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man message_size_limit = 40960000 mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain, M=DOMAIN.com, mail.$mydomain, www.$mydomain, f tp.$mydomain, sirio.$mydomain, mail-router.$mydomain mydomain = MYDOMAIN.com myhostname = mail.MYDOMAIN.com mynetworks = 168.100.10.0/24, 127.0.0.0/8, 192.168.200.0/24 myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix parent_domain_matches_subdomains = yes queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES receive_override_options = no_address_mappings relay_domains = $mydestination sample_directory = /usr/share/doc/postfix-2.3.3/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_delay_reject = no smtpd_helo_required = yes smtpd_recipient_restrictions = check_client_access hash:/etc/postfix/acce=s, check_helo_access hash:/etc/postfix/helo_access, permit_mynetworks, permit_sasl_authenticated, reject_unaut=_pipelining, reject_unauth_destination, r eject_non_fqdn_hostname, reject_non_fqdn_recipient, reject_inva=id_hostname, reject_non_fqdn_sender, reject_r bl_client sbl-xbl.spamhaus.org, check_policy_service inet:127.0.0.1:10023, = permit smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous smtpd_sasl_type = cyrus smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/pki/tls/certs/mail.MYDOMAIN.com.cert smtpd_tls_key_file = /etc/pki/tls/private/mail.MYDOMAIN.com.key smtpd_tls_loglevel = 1 smtpd_tls_security_level = may smtpd_tls_session_cache_database = btree:/var/spool/postfix/smtpd_tls_cac=e smtpd_tls_session_cache_timeout = 3600s tls_random_source = dev:/dev/urandom transport_maps = hash:/etc/postfix/transport unknown_hostname_reject_code = 550 unknown_local_recipient_reject_code = 550