[postfix-es] loops back to myself y virtual private servers

[Alberto Mir]

Hola, 

Tengo un problema en postfix con una maquina bastante peculiar: se trata de un 
servidor con varios "virtual private servers" instalados, esto es, corriendo varios 
sistemas enteros en modo chroot. Cada una de las máquinas virtuales tiene su propia 
IP, si bien todas ellas apuntan al mismo intefaz físico en la misma máquina.

Se puede encontrar más información sobre los VSERVERS en: 
http://www.solucorp.qc.ca/miscprj/s_context.hc

Bien, el tema es que hay un postfix instalado en la maquina "real" y otros tantos en las 
maquinas "virtuales" cada uno con su config independiente, y funcionando a la 
perfección excepto en un caso:
Al enviar correo de cualquier usuario de la maquina real a alguna cuenta en las 
maquinas virtuales, se produce un error del tipo: loops back to myself:

----------------------
Final-Recipient: rfc822; xxxxxxx en xxxxx.es 
Action: failed 
Status: 5.0.0 
Diagnostic-Code: X-Postfix; mail for xxxxxx.es loops back to myself 
------------------

La maquina de origen es el servidor real  (xx.xx.xx.19) y la de destino ,xx.xx.xx.20, es un 
servidor virtual (en realidad se trata de la misma máquina física y del mismo interfaz 
físico), dentro de la misma subred xx.xx.xx.xx, y ambas estan perfectamente definidas 
tanto en los DNS como en los /etc/hosts de cada maquina virtual y real.


¿Alguna idea de por donde empezar?



Ahi va mis postconf 

xx.xx.xx.19:
---------------------------
bounce_notice_recipient = postmaster
access_map_reject_code = 554
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
allow_mail_to_commands = alias,forward
allow_mail_to_files = alias,forward
allow_min_user = no
allow_percent_hack = yes
allow_untrusted_routing = no
alternate_config_directories = 
always_bcc = 
append_at_myorigin = yes
append_dot_mydomain = yes
best_mx_transport = 
biff = yes
body_checks = regexp:/etc/postfix/body_checks
bounce_notice_recipient = postmaster
bounce_size_limit = 50000
broken_sasl_auth_clients = no
canonical_maps = 
command_directory = /usr/sbin
command_expansion_filter =
1234567890!@%-
_=+:,./abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
command_time_limit = 1000s
config_directory = /etc/postfix
content_filter = 
daemon_directory = /usr/libexec/postfix
daemon_timeout = 18000s
debug_peer_level = 2
debug_peer_list = 
default_database_type = hash
default_delivery_slot_cost = 5
default_delivery_slot_discount = 50
default_delivery_slot_loan = 3
default_destination_concurrency_limit = 10
default_destination_recipient_limit = 50
default_extra_recipient_limit = 1000
default_minimum_delivery_slots = 3
default_privs = nobody
default_process_limit = 50
default_recipient_limit = 10000
default_transport = smtp
default_verp_delimiters = +=
defer_transports = 
delay_notice_recipient = postmaster
delay_warning_time = 0h
deliver_lock_attempts = 20
deliver_lock_delay = 1s
disable_dns_lookups = no
disable_verp_bounces = no
disable_vrfy_command = no
dont_remove = 0
double_bounce_sender = double-bounce
duplicate_filter_limit = 1000
empty_address_recipient = MAILER-DAEMON
error_notice_recipient = postmaster
expand_owner_alias = no
export_environment = TZ
extract_recipient_limit = 10240
fallback_relay = 
fallback_transport = 
fast_flush_domains = $relay_domains
fast_flush_purge_time = 7d
fast_flush_refresh_time = 12h
fault_injection_code = 0
fork_attempts = 5
fork_delay = 1s
forward_expansion_filter =
1234567890!@%-
_=+:,./abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
forward_path =
$home/.forward${recipient_delimiter}${extension},$home/.forward
hash_queue_depth = 2
hash_queue_names = incoming,active,deferred,bounce,defer,flush
header_checks = regexp:/etc/postfix/header_checks
header_size_limit = 102400
home_mailbox = 
hopcount_limit = 50
ignore_mx_lookup_error = no
import_environment = MAIL_CONFIG MAIL_DEBUG MAIL_LOGTAG TZ XAUTHORITY
DISPLAY
in_flow_delay = 1s
inet_interfaces = all
initial_destination_concurrency = 5
invalid_hostname_reject_code = 501
ipc_idle = 100s
ipc_timeout = 3600s
line_length_limit = 2048
lmtp_cache_connection = yes
lmtp_connect_timeout = 0s
lmtp_data_done_timeout = 600s
lmtp_data_init_timeout = 120s
lmtp_data_xfer_timeout = 180s
lmtp_lhlo_timeout = 300s
lmtp_mail_timeout = 300s
lmtp_quit_timeout = 300s
lmtp_rcpt_timeout = 300s
lmtp_rset_timeout = 300s
lmtp_sasl_auth_enable = no
lmtp_sasl_password_maps = 
lmtp_sasl_security_options = noplaintext, noanonymous
lmtp_skip_quit_response = no
lmtp_tcp_port = 24
local_command_shell = 
local_destination_concurrency_limit = 2
local_destination_recipient_limit = 1
local_recipient_maps = $alias_maps unix:passwd.byname
local_transport = local
luser_relay = 
mail_name = Postfix
mail_owner = postfix
mail_release_date = 20020331
mail_spool_directory = /var/mail
mail_version = 1.1.7
mailbox_command = 
mailbox_command_maps = 
mailbox_delivery_lock = flock, dotlock
mailbox_size_limit = 51200000
mailbox_transport = 
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
maps_rbl_domains = blackholes.mail-abuse.org
maps_rbl_reject_code = 554
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains = 
masquerade_exceptions = 
max_idle = 100s
max_use = 100
maximal_backoff_time = 4000s
maximal_queue_lifetime = 5d
message_size_limit = 10240000
minimal_backoff_time = 1000s
mydestination = $myhostname, localhost.$mydomain, $mydomain,
mail.$mydomain
mydomain = XXXXXXXXXXXXX.net
myhostname = mail.XXXXXXXXXXXXX.net
mynetworks = hash:/etc/postfix/network_table
mynetworks_style = subnet
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases
non_fqdn_reject_code = 504
notify_classes = resource,software
owner_request_special = yes
parent_domain_matches_subdomains =
debug_peer_list,fast_flush_domains,mynetworks,permit_mx_backup_networks,qm
qpd_authorized_clients,relay_domains,smtpd_access_maps
permit_mx_backup_networks = 
prepend_delivered_header = command, file, forward
process_id_directory = pid
program_directory = /usr/libexec/postfix
propagate_unmatched_extensions = canonical, virtual
qmgr_fudge_factor = 100
qmgr_message_active_limit = 10000
qmgr_message_recipient_limit = 10000
qmgr_message_recipient_minimum = 10
qmgr_site_hog_factor = 100
qmqpd_authorized_clients = 
qmqpd_error_delay = 5s
qmqpd_timeout = 300s
queue_directory = /var/spool/postfix
queue_minfree = 0
queue_run_delay = 1000s
readme_directory = /etc/postfix/README_FILES
recipient_canonical_maps = 
recipient_delimiter = 
reject_code = 554
relay_domains = $mydestination
relay_domains_reject_code = 554
relayhost = 
relocated_maps = 
require_home_directory = no
sample_directory = /etc/postfix/samples
sender_canonical_maps = 
sendmail_path = /usr/sbin/sendmail
service_throttle_time = 60s
setgid_group = postdrop
smtp_always_send_ehlo = yes
smtp_bind_address = 
smtp_connect_timeout = 0s
smtp_data_done_timeout = 600s
smtp_data_init_timeout = 120s
smtp_data_xfer_timeout = 180s
smtp_destination_concurrency_limit =
$default_destination_concurrency_limit
smtp_destination_recipient_limit = $default_destination_recipient_limit
smtp_helo_timeout = 300s
smtp_line_length_limit = 990
smtp_mail_timeout = 300s
smtp_never_send_ehlo = no
smtp_pix_workaround_delay_time = 10s
smtp_pix_workaround_threshold_time = 500s
smtp_quit_timeout = 300s
smtp_randomize_addresses = yes
smtp_rcpt_timeout = 300s
smtp_sasl_auth_enable = no
smtp_sasl_password_maps = 
smtp_sasl_security_options = noplaintext, noanonymous
smtp_skip_4xx_greeting = yes
smtp_skip_5xx_greeting = yes
smtp_skip_quit_response = yes
smtpd_banner = ESMTP XXXXXXXXXXXXX Mail Exchanger (9.9.2)
smtpd_client_restrictions = 
smtpd_delay_reject = yes
smtpd_error_sleep_time = 5s
smtpd_etrn_restrictions = 
smtpd_hard_error_limit = 100
smtpd_helo_required = no
smtpd_helo_restrictions = 
smtpd_history_flush_threshold = 100
smtpd_junk_command_limit = 100
smtpd_noop_commands = 
smtpd_null_access_lookup_key = <>
smtpd_recipient_limit = 1000
smtpd_recipient_restrictions = permit_mynetworks, reject_non_fqdn_recipient, 
check_relay_domains
smtpd_restriction_classes = 
smtpd_sasl_auth_enable = no
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_sender_login_maps = 
smtpd_sender_restrictions = check_sender_access
hash:/etc/postfix/sender_access, reject_unknown_sender_domain
smtpd_soft_error_limit = 10
smtpd_timeout = 300s
soft_bounce = no
stale_lock_time = 500s
strict_rfc821_envelopes = no
sun_mailtool_compatibility = no
swap_bangpath = yes
syslog_facility = mail
syslog_name = postfix
transport_maps = 
transport_retry_time = 60s
trigger_timeout = 10s
undisclosed_recipients_header = To: undisclosed-recipients:;
unknown_address_reject_code = 450
unknown_client_reject_code = 450
unknown_hostname_reject_code = 450
verp_delimiter_filter = -=+
virtual_gid_maps = 
virtual_mailbox_base = 
virtual_mailbox_limit = 51200000
virtual_mailbox_lock = fcntl
virtual_mailbox_maps = 
virtual_maps = hash:/etc/postfix/virtual
virtual_minimum_uid = 100
--------------------


xx.xx.xx.20
-----------------
bounce_notice_recipient = postmaster
access_map_reject_code = 554
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
allow_mail_to_commands = alias,forward
allow_mail_to_files = alias,forward
allow_min_user = no
allow_percent_hack = yes
allow_untrusted_routing = no
alternate_config_directories = 
always_bcc = 
append_at_myorigin = yes
append_dot_mydomain = yes
best_mx_transport = 
biff = yes
body_checks = regexp:/etc/postfix/anti_virus
bounce_notice_recipient = postmaster
bounce_size_limit = 50000
broken_sasl_auth_clients = no
canonical_maps = 
command_directory = /usr/sbin
command_expansion_filter =
1234567890!@%-
_=+:,./abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
command_time_limit = 1000s
config_directory = /etc/postfix
content_filter = 
daemon_directory = /usr/libexec/postfix
daemon_timeout = 18000s
debug_peer_level = 2
debug_peer_list = 
default_database_type = hash
default_delivery_slot_cost = 5
default_delivery_slot_discount = 50
default_delivery_slot_loan = 3
default_destination_concurrency_limit = 10
default_destination_recipient_limit = 50
default_extra_recipient_limit = 1000
default_minimum_delivery_slots = 3
default_privs = nobody
default_process_limit = 50
default_recipient_limit = 10000
default_transport = smtp
default_verp_delimiters = +=
defer_transports = 
delay_notice_recipient = postmaster
delay_warning_time = 0h
deliver_lock_attempts = 20
deliver_lock_delay = 1s
disable_dns_lookups = no
disable_verp_bounces = no
disable_vrfy_command = no
dont_remove = 0
double_bounce_sender = double-bounce
duplicate_filter_limit = 1000
empty_address_recipient = MAILER-DAEMON
error_notice_recipient = postmaster
expand_owner_alias = no
export_environment = TZ
extract_recipient_limit = 10240
fallback_relay = 
fallback_transport = 
fast_flush_domains = $relay_domains
fast_flush_purge_time = 7d
fast_flush_refresh_time = 12h
fault_injection_code = 0
fork_attempts = 5
fork_delay = 1s
forward_expansion_filter =
1234567890!@%-
_=+:,./abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
forward_path =
$home/.forward${recipient_delimiter}${extension},$home/.forward
hash_queue_depth = 2
hash_queue_names = incoming,active,deferred,bounce,defer,flush
header_checks = regexp:/etc/postfix/header_checks
header_size_limit = 102400
home_mailbox = 
hopcount_limit = 50
ignore_mx_lookup_error = no
import_environment = MAIL_CONFIG MAIL_DEBUG MAIL_LOGTAG TZ XAUTHORITY
DISPLAY
in_flow_delay = 1s
inet_interfaces = all
initial_destination_concurrency = 5
invalid_hostname_reject_code = 501
ipc_idle = 100s
ipc_timeout = 3600s
line_length_limit = 2048
lmtp_cache_connection = yes
lmtp_connect_timeout = 0s
lmtp_data_done_timeout = 600s
lmtp_data_init_timeout = 120s
lmtp_data_xfer_timeout = 180s
lmtp_lhlo_timeout = 300s
lmtp_mail_timeout = 300s
lmtp_quit_timeout = 300s
lmtp_rcpt_timeout = 300s
lmtp_rset_timeout = 300s
lmtp_sasl_auth_enable = no
lmtp_sasl_password_maps = 
lmtp_sasl_security_options = noplaintext, noanonymous
lmtp_skip_quit_response = no
lmtp_tcp_port = 24
local_command_shell = 
local_destination_concurrency_limit = 2
local_destination_recipient_limit = 1
local_recipient_maps = 
local_transport = local
luser_relay = 
mail_name = Postfix
mail_owner = postfix
mail_release_date = 20020331
mail_spool_directory = /var/mail
mail_version = 1.1.7
mailbox_command = 
mailbox_command_maps = 
mailbox_delivery_lock = flock, dotlock
mailbox_size_limit = 51200000
mailbox_transport = 
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
maps_rbl_domains = 
maps_rbl_reject_code = 554
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains = 
masquerade_exceptions = 
max_idle = 100s
max_use = 100
maximal_backoff_time = 4000s
maximal_queue_lifetime = 5d
message_size_limit = 10240000
minimal_backoff_time = 1000s
mydestination = $myhostname, $mydomain,	mail.$mydomain
mydomain = domain.com
myhostname = mail.domain.com
mynetworks = hash:/etc/postfix/network_table
mynetworks_style = subnet
myorigin = $myhostname
newaliases_path = /usr/bin/newaliases
non_fqdn_reject_code = 504
notify_classes = resource,software
owner_request_special = yes
parent_domain_matches_subdomains =
debug_peer_list,fast_flush_domains,mynetworks,permit_mx_backup_networks,qm
qpd_authorized_clients,relay_domains,smtpd_access_maps
permit_mx_backup_networks = 
prepend_delivered_header = command, file, forward
process_id_directory = pid
program_directory = /usr/libexec/postfix
propagate_unmatched_extensions = canonical, virtual
qmgr_fudge_factor = 100
qmgr_message_active_limit = 10000
qmgr_message_recipient_limit = 10000
qmgr_message_recipient_minimum = 10
qmgr_site_hog_factor = 100
qmqpd_authorized_clients = 
qmqpd_error_delay = 5s
qmqpd_timeout = 300s
queue_directory = /var/spool/postfix
queue_minfree = 0
queue_run_delay = 1000s
readme_directory = /etc/postfix/README_FILES
recipient_canonical_maps = 
recipient_delimiter = 
reject_code = 554
relay_domains = $mydestination
relay_domains_reject_code = 554
relayhost = 
relocated_maps = 
require_home_directory = no
sample_directory = /etc/postfix/samples
sender_canonical_maps = 
sendmail_path = /usr/sbin/sendmail
service_throttle_time = 60s
setgid_group = postdrop
smtp_always_send_ehlo = yes
smtp_bind_address = 
smtp_connect_timeout = 0s
smtp_data_done_timeout = 600s
smtp_data_init_timeout = 120s
smtp_data_xfer_timeout = 180s
smtp_destination_concurrency_limit =
$default_destination_concurrency_limit
smtp_destination_recipient_limit = $default_destination_recipient_limit
smtp_helo_timeout = 300s
smtp_line_length_limit = 990
smtp_mail_timeout = 300s
smtp_never_send_ehlo = no
smtp_pix_workaround_delay_time = 10s
smtp_pix_workaround_threshold_time = 500s
smtp_quit_timeout = 300s
smtp_randomize_addresses = yes
smtp_rcpt_timeout = 300s
smtp_sasl_auth_enable = no
smtp_sasl_password_maps = 
smtp_sasl_security_options = noplaintext, noanonymous
smtp_skip_4xx_greeting = yes
smtp_skip_5xx_greeting = yes
smtp_skip_quit_response = yes
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_client_restrictions = 
smtpd_delay_reject = yes
smtpd_error_sleep_time = 5s
smtpd_etrn_restrictions = 
smtpd_hard_error_limit = 100
smtpd_helo_required = no
smtpd_helo_restrictions = 
smtpd_history_flush_threshold = 100
smtpd_junk_command_limit = 100
smtpd_noop_commands = 
smtpd_null_access_lookup_key = <>
smtpd_recipient_limit = 1000
smtpd_recipient_restrictions = permit_mynetworks,
reject_non_fqdn_recipient,	check_relay_domains
smtpd_restriction_classes = 
smtpd_sasl_auth_enable = no
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_sender_login_maps = 
smtpd_sender_restrictions = check_sender_access
hash:/etc/postfix/sender_access,	reject_unknown_sender_domain
smtpd_soft_error_limit = 10
smtpd_timeout = 300s
soft_bounce = no
stale_lock_time = 500s
strict_rfc821_envelopes = no
sun_mailtool_compatibility = no
swap_bangpath = yes
syslog_facility = mail
syslog_name = postfix
transport_maps = 
transport_retry_time = 60s
trigger_timeout = 10s
undisclosed_recipients_header = To: undisclosed-recipients:;
unknown_address_reject_code = 450
unknown_client_reject_code = 450
unknown_hostname_reject_code = 450
verp_delimiter_filter = -=+
virtual_gid_maps = 
virtual_mailbox_base = 
virtual_mailbox_limit = 51200000
virtual_mailbox_lock = fcntl
virtual_mailbox_maps = 
virtual_maps = hash:/etc/postfix/virtual
virtual_minimum_uid = 100
virtual_uid_maps = 
----------------------


Saludos.
Alberto Mir
Admin - Webmaster.
Dept. Producción.
amir en linkz.es
_______________________

LINKZ multimedia - www.linkz.es
Tel. & Fax: +34 963 32 90 20 *
Valencia (SPAIN) - San Diego (USA)
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