# DO NOT EDIT THIS FILE. EDIT THE MAIN.CF FILE INSTEAD. THE STUFF
# HERE JUST SERVES AS AN EXAMPLE.
#
# This file contains example settings of Postfix configuration parameters
# that control the SMTP server program.

#
# MISCELLANEOUS
#

# The disable_vrfy_command parameter allows you to disable the SMTP
# VRFY command. This stops some techniques used by spammers to harvest
# email addresses.
#
#disable_vrfy_command = no

# The smtpd_banner parameter specifies the text that follows the 220
# status code in the SMTP greeting banner. Some people like to see
# the mail version advertised. By default, Postfix shows no version.
#
# You MUST specify the $myhostname at the start of the text. When
# the SMTP client sees its own hostname at the start of an SMTP
# greeting banner it will report a mailer loop. That's better than
# having a machine meltdown.
#
# smtpd_banner = $myhostname ESMTP $mail_name ($mail_version)
smtpd_banner = $myhostname ESMTP $mail_name

# The smtpd_etrn_restrictions parameter restricts what clients are
# allowed to issue the ETRN command. The present Postfix ETRN differs
# from other ETRN implementations in that it flushes mail for all
# destinations. This will change in the future.
#
# The default is to allow ETRN from any host.  The following restrictions
# are available:
#
#   reject_unknown_client: reject the request if the client hostname is unknown.
#   permit_mynetworks: permit if the client address matches $mynetworks.
#   check_client_access maptype:mapname
#   maptype:mapname: look up client name, parent domains, client address,
#	or networks obtained by stripping octets.
#	Reject if result is REJECT or "[45]xx text"
#	Permit otherwise.
#   reject_maps_rbl: reject if the reverse client network address
#	is listed under $maps_rbl_domains.
#   reject: reject the request. Place this at the end of a restriction.
#   permit: permit the request. Place this at the end of a restriction.
smtpd_etrn_restrictions =

# The smtpd_recipient_limit parameter restricts the number of recipients
# that the SMTP server accepts per message delivery.
#
smtpd_recipient_limit = 1000

# The smtpd_timeout parameter limits the time to send an SMTP server
# response and to receive an SMTP client request.
#
# Note: if you set SMTP timeouts to large values you must update the
# global ipc_timeout parameter as well. See sample-misc.cf for details.
#
# Time units: s (seconds), m (minutes), h (hours), d (days), w (weeks).
# The default time unit is s (seconds).
#
smtpd_timeout = 300s

# The strict_rfc821_envelopes configuration parameter controls whether
# the Postfix SMTP server requires that MAIL FROM and RCPT TO addresses
# are specified within <>, and that MAIL FROM and RCPT TO addresses
# do not contain RFC822-style comments or phrases.  It's great to
# stop SPAM mailers. But it also trips up broken peecee clients.
# 
# By default, Postfix SMTPD allows RFC822 syntax in MAIL FROM and RCPT TO.
# 
strict_rfc821_envelopes = no

#
# TARPIT CONTROLS
#

# The smtpd_error_sleep_time parameter specifies the time in seconds
# the SMTP server waits before sending a 4xx or 5xx SMTP server error
# response. This prevents naive clients from going into an error -
# disconnect - connect - error loop.
#
smtpd_error_sleep_time = 5

# The smtpd_soft_error_limit parameter specifies an error count lower
# limit.  When an SMTP client has made this number of errors within
# a session, the server waits error_count seconds before responding
# to any client request.
#
smtpd_soft_error_limit = 10

# The smtpd_hard_error_limit parameter specifies an error count upper
# limit.  The SMTP server disconnects after an SMTP client makes this
# number of errors within a session.
#
smtpd_hard_error_limit = 100

#
# UCE RESTRICTIONS
#

# The mynetworks parameter specifies the list of "trusted" SMTP
# clients that have more privileges than "strangers".
#
# In particular, "trusted" SMTP clients are allowed to relay mail
# through Postfix.  See the smtpd_recipient_restrictions parameter
# in file sample-smtpd.cf.
#
# You can specify the list of "trusted" network addresses by hand
# or you can let Postfix do it for you (which is the default).
#
# By default (mynetworks_style = subnet), Postfix "trusts" SMTP
# clients in the same IP subnetworks as the local machine.
# 
# Specify "mynetworks_style = class" when Postfix should "trust" SMTP
# clients in the same IP class A/B/C networks as the local machine.
# Don't do this with a dialup site - it would cause Postfix to "trust"
# your entire provider's network.  Instead, specify an explicit
# mynetworks list by hand, as described below.
#  
# Specify "mynetworks_style = host" when Postfix should "trust"
# only the local machine.
# 
# mynetworks_style = class
mynetworks_style = subnet
# mynetworks_style = host

# Alternatively, you can specify the mynetworks list by hand, in
# which case Postfix ignores the mynetworks_style setting.
#
# Specify an explicit list of network/netmask patterns, where the
# mask specifies the number of bits in the network part of a host
# address.
#
# You can also specify the absolute pathname of a pattern file instead
# of listing the patterns here.
#
#mynetworks = 168.100.189.0/28, 127.0.0.0/8
#mynetworks = $config_directory/mynetworks

# The smtpd_client_restrictions parameter specifies optional restrictions
# on SMTP client host names and addresses.
#
# The default is to allow connections from any host.  The following
# restrictions are available:
#
#   reject_unknown_client: reject the request if the client hostname is unknown.
#   permit_mynetworks: permit if the client address matches $mynetworks.
#   check_client_access maptype:mapname
#   maptype:mapname: look up client name, parent domains, client address,
#	or networks obtained by stripping octets.
#	Reject if result is REJECT or "[45]xx text"
#	Permit otherwise.
#   reject_maps_rbl: reject if the client is listed under $maps_rbl_domains.
#   reject: reject the request. Place this at the end of a restriction.
#   permit: permit the request. Place this at the end of a restriction.
#
# Restrictions are applied in the order as specified; the first
# restriction that matches wins.
#
# Specify a list of restrictions, separated by commas and/or whitespace.
# Continue long lines by starting the next line with whitespace.
#
#smtpd_client_restrictions = permit_mynetworks, reject_unknown_client
#smtpd_client_restrictions = reject_maps_rbl, reject_unknown_client
smtpd_client_restrictions = 

# The smtpd_helo_required parameter optionally turns on the requirement
# that SMTP clients must introduce themselves at the beginning of an
# SMTP session.
#
# smtpd_helo_required = yes
smtpd_helo_required = no

# The smtpd_helo_restrictions parameter specifies optional restrictions
# on what SMTP clients can send in SMTP HELO and EHLO commands.
#
# The default is to permit everything.  The following restrictions
# are available:
#
#   permit_mynetworks: permit if the client address matches $mynetworks.
#   reject_unknown_client: reject the request if the client hostname is unknown.
#   reject_maps_rbl: reject if the client is listed under $maps_rbl_domains.
#   reject_invalid_hostname: reject HELO hostname with bad syntax.
#   reject_unknown_hostname: reject HELO hostname without DNS A or MX record.
#   reject_non_fqdn_hostname: reject HELO hostname that is not in FQDN form
#   check_helo_access maptype:mapname
#   maptype:mapname: look up HELO hostname or parent domains.
#	Reject if result is REJECT or "[45]xx text"
#	Permit otherwise.
#   check_client_access maptype:mapname: see smtpd_client_restrictions.
#   reject: reject the request. Place this at the end of a restriction.
#   permit: permit the request. Place this at the end of a restriction.
#
# Restrictions are applied in the order as specified; the first
# restriction that matches wins.
#
# Specify a list of restrictions, separated by commas and/or whitespace.
# Continue long lines by starting the next line with whitespace.
#
# smtpd_helo_restrictions = permit_mynetworks, reject_invalid_hostname
# smtpd_helo_restrictions = permit_mynetworks, reject_unknown_hostname
smtpd_helo_restrictions = 

# The smtpd_sender_restrictions parameter specifies optional restrictions
# on sender addresses that SMTP clients can send in MAIL FROM commands.
# 
# The default is to permit any sender address.  The following
# restrictions are available:
#
#   permit_mynetworks: permit if the client address matches $mynetworks.
#   reject_unknown_client: reject the request if the client hostname is unknown.
#   reject_maps_rbl: reject if the client is listed under $maps_rbl_domains.
#   reject_invalid_hostname: reject HELO hostname with bad syntax.
#   reject_unknown_hostname: reject HELO hostname without DNS A or MX record.
#   reject_unknown_sender_domain: reject sender domain without A or MX record.
#   check_sender_access maptype:mapname
#   maptype:mapname: look up sender address, parent domain, or localpart@.
#	Reject if result is REJECT or "[45]xx text"
#	Permit otherwise.
#   check_client_access maptype:mapname: see smtpd_client_restrictions.
#   check_helo_access maptype:mapname: see smtpd_helo_restrictions.
#   reject_non_fqdn_hostname: reject HELO hostname that is not in FQDN form
#   reject_non_fqdn_sender: reject sender address that is not in FQDN form
#   reject: reject the request. Place this at the end of a restriction.
#   permit: permit the request. Place this at the end of a restriction.
#
# Restrictions are applied in the order as specified; the first
# restriction that matches wins.
#
# Specify a list of restrictions, separated by commas and/or whitespace.
# Continue long lines by starting the next line with whitespace.
#
# smtpd_sender_restrictions = reject_unknown_sender_domain
# smtpd_sender_restrictions = reject_unknown_sender_domain, hash:/etc/postfix/access
smtpd_sender_restrictions = 

# The smtpd_recipient_restrictions parameter specifies restrictions on
# recipient addresses that SMTP clients can send in RCPT TO commands.
# 
# By default, Postfix relays mail
# - from trusted clients whose IP address matches $mynetworks,
# - from trusted clients matching $relay_domains or subdomains thereof,
# - from untrusted clients to destinations that match $relay_domains
#   or subdomains thereof, except addresses with sender-specified routing.
# The default relay_domains value is $mydestination.
#
# In addition to the above, the Postfix SMTP server by default accepts mail
# that Postfix is final destination for:
# - destinations that match $inet_interfaces,
# - destinations that match $mydestination
# - destinations that match $virtual_maps.
# These destinations do not need to be listed in $relay_domains.
# 
# The following restrictions are available (* is part of default setting):
#
#  *permit_mynetworks: permit if the client address matches $mynetworks.
#   reject_unknown_client: reject the request if the client hostname is unknown.
#   reject_maps_rbl: reject if the client is listed under $maps_rbl_domains.
#   reject_invalid_hostname: reject HELO hostname with bad syntax.
#   reject_unknown_hostname: reject HELO hostname without DNS A or MX record.
#   reject_unknown_sender_domain: reject sender domain without A or MX record.
#  *check_relay_domains: permit only mail 
#	- to destinations matching $inet_interfaces, $mydestination, 
#	  or $virtual_maps,
#	- from trusted clients matching $relay_domains or subdomain thereof,
#	- from untrusted clients to destinations matching $relay_domains or
#	  subdomain thereof (except addresses with sender-specified routing),
#	Reject anything else.
#   permit_auth_destination: permit mail 
#	- to destinations matching $inet_interfaces, $mydestination, 
#	  or $virtual_maps.
#	- to destinations matching $relay_domains or subdomain thereof,
#	  except for addresses with sender-specified routing.
#   reject_unauth_destination: reject mail unless it is sent 
#	- to destinations matching $inet_interfaces, $mydestination, 
#	  or $virtual_maps.
#	- to destinations matching $relay_domains or subdomain thereof,
#	  except for addresses with sender-specified routing.
#   reject_unauth_pipelining: reject mail from improperly pipelining spamware
#   permit_mx_backup: accept mail for sites that list me as MX host.
#   reject_unknown_recipient_domain: reject domains without A or MX record.
#   check_recipient_access maptype:mapname
#   maptype:mapname: look up recipient address, parent domain, or localpart@.
#	Reject if result is REJECT or "[45]xx text"
#	Permit otherwise.
#   check_client_access maptype:mapname: see smtpd_client_restrictions.
#   check_helo_access maptype:mapname: see smtpd_helo_restrictions.
#   check_sender_access maptype:mapname: see smtpd_sender_restrictions.
#   reject_non_fqdn_hostname: reject HELO hostname that is not in FQDN form
#   reject_non_fqdn_sender: reject sender address that is not in FQDN form
#   reject_non_fqdn_recipient: reject recipient address that is not in FQDN form
#   reject: reject the request. Place this at the end of a restriction.
#   permit: permit the request. Place this at the end of a restriction.
#
# Restrictions are applied in the order as specified; the first
# restriction that matches wins.
#
# Specify a list of restrictions, separated by commas and/or whitespace.
# Continue long lines by starting the next line with whitespace.
#
# NOTE: YOU MUST SPECIFY AT LEAST ONE OF THE FOLLOWING RESTRICTIONS
# OTHERWISE POSTFIX REFUSES TO RECEIVE MAIL:
#	reject, check_relay_domains, reject_unauth_destination
#
smtpd_recipient_restrictions = permit_mynetworks,check_relay_domains

#
# ADDITIONAL UCE CONTROLS
#

# The allow_untrusted_routing parameter controls if Postfix will
# forward mail with sender-specified routing (user[@%!]remote[@%!]site)
# from untrusted clients to destinations that are blessed by the
# relay_domains parameter.
# 
# By default, untrusted clients are not allowed to specify routing.
# This closes a nasty open relay loophole where a backup MX host can
# be tricked into forwarding junk mail to a primary MX host which
# then spams it out to the world.
#
allow_untrusted_routing = no

# The maps_rbl_domains parameter specifies an optional list of DNS
# domains that publish the network addresses of blacklisted hosts.
#
# By default, RBL blacklist lookups are disabled. See the
# smtpd_client_restrictions parameter.
#
# The real-time blackhole list works as follows: reverse the client
# network address, and reject service if it is listed below any of
# the following domains.
#
#maps_rbl_domains = blackholes.mail-abuse.org relays.mail-abuse.org
maps_rbl_domains = blackholes.mail-abuse.org

# The relay_domains parameter restricts what client hostname domains
# (and subdomains thereof) this mail system will relay mail from,
# and restricts what destination domains (and subdomains thereof)
# this system will relay mail to.
# 
# By default, Postfix relays mail
# - from trusted clients whose IP address matches $mynetworks, 
# - from trusted clients matching $relay_domains or subdomains thereof,
# - from untrusted clients to destinations that match $relay_domains
#   or subdomains thereof, except addresses with sender-specified routing.
# The default relay_domains value is $mydestination.  
# 
# In addition to the above, the Postfix SMTP server by default accepts mail 
# that Postfix is final destination for:
# - destinations that match $inet_interfaces, 
# - destinations that match $mydestination 
# - destinations that match $virtual_maps.
# These destinations do not need to be listed in $relay_domains.
#
# Specify a list of hosts or domains, /file/name patterns or type:name
# lookup tables, separated by commas and/or whitespace.  Continue
# long lines by starting the next line with whitespace. A file name
# is replaced by its contents; a type:name table is matched when a
# (parent) domain appears as lookup key.
#
# NOTE: Postfix will not automatically forward mail for domains that
# list this system as their primary or backup MX host. See the
# permit_mx_backup restriction, in the description of the
# smtpd_recipient_restrictions parameter.
#
relay_domains = $mydestination

#
# RESPONSE CODES
#

# The access_map_reject_code parameter specifies the SMTP server
# response code when a client violates an access map restriction.
#
# Do not change this unless you have a complete understanding of RFC 822.
#
access_map_reject_code = 550

# The invalid_hostname_reject_code parameter specifies the SMTP server
# response when a client violates the reject_invalid_hostname anti-UCE
# restriction.
#
# Do not change this unless you have a complete understanding of RFC 822.
#
invalid_hostname_reject_code = 501

# The maps_rbl_reject_code parameter specifies the SMTP server response
# when a client violates the maps_rbl_domains restriction.
#
# Do not change this unless you have a complete understanding of RFC 822.
#
maps_rbl_reject_code = 550

# The reject_code parameter specifies the SMTP server response code
# when an SMTP client matches a reject restriction.
#
# Do not change this unless you have a complete understanding of RFC 822.
#
reject_code = 550

# The relay_domains_reject_code parameter specifies the SMTP server
# response when a client attempts to violate the mail relay policy.
#
# Do not change this unless you have a complete understanding of RFC 822.
#
relay_domains_reject_code = 550

# The unknown_address_reject_code parameter specifies the SMTP server
# response when a client violates the reject_unknown_sender_domain
# or reject_unknown_recipient_domain restrictions.
#
# Do not change this unless you have a complete understanding of RFC 822.
#
unknown_address_reject_code = 450

# The unknown_client_reject_code parameter specifies the SMTP server
# response when a client without address to name mapping violates
# the reject_unknown_clients restriction.
#
# Do not change this unless you have a complete understanding of RFC 822.
#
unknown_client_reject_code = 450

# The unknown_hostname_reject_code parameter specifies the SMTP server
# response when a client violates the reject_unknown_hostname
# restriction.
#
# Do not change this unless you have a complete understanding of RFC 822.
#
unknown_hostname_reject_code = 450
