soft_bounce=yes
default_database_type = cdb

smtpd_sender_login_maps = cdb:/etc/postfix/virtual

smtpd_restriction_classes = pass_postmaster

# get mail for abuse@ and postmaster@ after greylisting
pass_postmaster = permit_mynetworks, 
    permit_sasl_authenticated,
    reject_unauth_destination,
    check_policy_service inet:127.0.0.1:2501,
    permit
				 
#=============================================================================#
#			Общесистемные ограничения
#=============================================================================#
# 100Mb -- максимальный размер сообщения
message_size_limit = 100000000
virtual_mailbox_limit = 1024000000	
mailbox_size_limit = 1024000000	

#=============================================================================#
#				TLS
#=============================================================================#
# Если клиенты поддерживают TLS -- мы используем TLS, если нет, то позволяем
# работать без TLS
smtpd_use_tls = yes
smtpd_enforce_tls = no
smtp_tls_cert_file=/var/lib/ssl/certs/smtp.pem
smtp_tls_dcert_file=/var/lib/ssl/certs/smtp.pem

#=============================================================================#
#			Параноидальные настройки
#=============================================================================#
# Требование для клиентских приложений соблюдения RFC
# это адекватное требование, так как своих клиентов надо учить пользоваться
# корректным ПО, а снаружи почта должна в любом случае проходить через почтовые
# сервера
smtpd_helo_required = yes
#strict_rfc821_envelopes = yes
# Запрещаем исходящую почту с наших доменов, но с несуществующих у нас адресов
smtpd_reject_unlisted_sender = yes
smtpd_reject_unlisted_recipient = yes
# для соблюдения стандарта и чтобы не сносило крышу тупым серверам
smtpd_delay_reject = yes

#=============================================================================#
#		Проверка существования адреса-отправителя
#=============================================================================#
# Любопытный side-effect -- почта не будет приниматься от пользователя,
# который не принимает почту от нас

#=============================================================================#
#			Правила-ограничения
#=============================================================================#

# (должен содержать в себе и hostname, и домен, иначе снесёт крышу)
myhostname = smtp.freesource.info
inet_interfaces = all
mydestination = localhost, $myhostname

# 550 -- reject mail
# 450 -- try again later
# Необходимо для того, чтобы при ошибках конфигурации почта все же доходила
unknown_local_recipient_reject_code = 450

mynetworks = 127.0.0.1/32, 10.254.200.0/24

# INPUT RATE CONTROL
# A Postfix process will pause for $in_flow_delay seconds before
# accepting a new message, when the message arrival rate exceeds the
# message delivery rate. With the default 100 SMTP server process
# limit, this limits the mail inflow to 100 messages a second more
# than the number of messages delivered per second.
# 
# Specify 0 to disable the feature. Valid delays are 0..10.
#in_flow_delay = 1s

mailbox_command = /usr/bin/procmail -a $DOMAIN -d $LOGNAME

#mailbox_transport = lmtp:unix:/file/name
#mailbox_transport = cyrus

# NOTE: if you use this feature for accounts not in the UNIX password
# file, then you must update the "local_recipient_maps" setting in
# the main.cf file, otherwise the SMTP server will reject mail for    
# non-UNIX accounts with "User unknown in local recipient table".
#fallback_transport = lmtp:unix:/file/name
#fallback_transport = cyrus
#fallback_transport =

# The luser_relay parameter specifies an optional destination address
# for unknown recipients.  By default, mail for unknown@$mydestination
# and unknown@[$inet_interfaces] is returned as undeliverable.
#
# The following expansions are done on luser_relay: $user (recipient
# username), $shell (recipient shell), $home (recipient home directory),
# $recipient (full recipient address), $extension (recipient address
# extension), $domain (recipient domain), $local (entire recipient
# localpart), $recipient_delimiter. Specify ${name?value} or
# ${name:value} to expand value only when $name does (does not) exist.
#
# luser_relay works only for the default Postfix local delivery agent.
#
# NOTE: if you use this feature for accounts not in the UNIX password
# file, then you must specify "local_recipient_maps =" (i.e. empty) in
# the main.cf file, otherwise the SMTP server will reject mail for    
# non-UNIX accounts with "User unknown in local recipient table".
#
#luser_relay = $user@other.host
#luser_relay = $local@other.host
#luser_relay = admin+$local

# JUNK MAIL CONTROLS
header_checks = regexp:/etc/postfix/header_checks

smtpd_banner = $myhostname ESMTP $mail_name
#smtpd_banner = $myhostname ESMTP $mail_name ($mail_version)

# The smtpd_etrn_restrictions parameter restricts what clients are
# allowed to issue the ETRN command.
#
# The Postfix ETRN command accepts only destinations that are eligible
# for the Postfix "fast flush" service. See the samples/flush.cf file
# for details.
#
# 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
#	look up client name, parent domains, client address,
#	or networks obtained by stripping octets.
#	see access(5) for possible lookup results.
#   reject_rbl_client domain.tld: reject if the reverse client network
#	address is listed in an A record under domain.tld.
#   reject_rhsbl_client domain.tld: reject if the client hostname is listed
#	in an A record under domain.tld.
#   reject: reject the request. Place this at the end of a restriction.
#   permit: permit the request. Place this at the end of a restriction.
#   warn_if_reject: next restriction logs a warning instead of rejecting.
#
# You may also list any helo or client restrictions here (see below).
#
smtpd_etrn_restrictions = permit_mynetworks, reject

# Так как почтовые ящики находятся на быстром RAID-массиве с _кэшированием_,
# логичнее направлять сразу несколько сообщений
local_destination_concurrency_limit = 16
default_destination_concurrency_limit = 16

# INSTALL-TIME CONFIGURATION INFORMATION
readme_directory = /etc/postfix/README_FILES
sample_directory = /etc/postfix/samples
sendmail_path = /usr/sbin/sendmail
#setgid_group = postdrop
command_directory = /usr/sbin
manpage_directory = /usr/share/man
daemon_directory = /usr/libexec/postfix
newaliases_path = /usr/bin/newaliases
mailq_path = /usr/bin/mailq
queue_directory = /var/spool/postfix
mail_owner = postfix

## START: Virtual hosting
virtual_alias_maps		= cdb:/etc/postfix/virtual
virtual_alias_expansion_limit	= 999
virtual_transport       	= virtual
virtual_mailbox_base    	= /var/spool/popboxes
virtual_mailbox_maps    	= cdb:/etc/postfix/virtual-mailboxes
virtual_mailbox_domains 	= cdb:/etc/postfix/virtual-domains
virtual_minimum_uid     	= 100
virtual_uid_maps        	= static:109
virtual_gid_maps        	= static:502

# All domains and users delivered by the local delivery agent.
# local_recipient_maps is used by the SMTP server to reject mail
# for unknown users.
local_transport = local
local_recipient_maps = $alias_maps, cdb:/etc/postfix/local-recipients
## END: Virtual hosting

smtpd_sasl_auth_enable = yes

### START: ordb.org
#strict_rfc811_envelopes = yes
# If server for some time in blacklist, I want to wait, not reject
maps_rbl_reject_code = 410

# Очень много вменяемый почтовиков нарушают эти правила    
smtpd_helo_restrictions = 
    permit_mynetworks,

# Проверки на этапе соединения
#  - Диалапщиков, напрямую рассылающих письма, давить
#  - С открытых релеев почту мы принимать не станем
#  - С почтовых серверов, нарушающих RFC, мы почту тоже принимать не станем
smtpd_client_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated,
# TIDI use rbl here

# Проверки на этапе MAIL FROM
# sender must be valid e-mail
# if sender domain not exists, it can be only spam
# кривые адреса не позволять даже от своих (неизвестные и non-FQDN)
smtpd_sender_restrictions =
    # get mail for abuse and postmaster
    check_recipient_access pcre:/etc/postfix/recipient_checks.pcre,
    # Есть ламера, от которых стоит принимать почту (ибо verify не проходит)
    check_sender_access cdb:/etc/postfix/sender_access,
    # На несуществующие мыльники мы отказываемся принять почту даже от "своих"
    reject_unlisted_sender,
    reject_unverified_sender,

    reject_sender_login_mismatch,

    permit_mynetworks,
    reject_unknown_sender_domain,
    reject_non_fqdn_sender,
    # if user not logged in we can't send mail from it
    permit_sasl_authenticated,

    reject_invalid_hostname,
    reject_unknown_hostname,
    reject_non_fqdn_hostname
    
#    reject_rbl_client cbl.abuseat.org

# Проверки на этапе SEND TO
# reject_unverified_recipient -- медленная операция, но позволяет "зачистить" большую часть спама, оставшегося после check_policy_service
smtpd_recipient_restrictions =
    permit_mynetworks,
    reject_unknown_recipient_domain,
    reject_non_fqdn_recipient,
    permit_sasl_authenticated,
    reject_unauth_destination,
    reject_unverified_recipient,
    check_sender_access cdb:/etc/postfix/sender_access,
    reject_unknown_recipient_domain,
    reject_unverified_recipient
    check_policy_service inet:127.0.0.1:2501,

# Без этой строки обратная проверка существования имён пользователей
# будет выполняться слишком долго
address_verify_map = btree:/etc/postfix/address_verify_cache
address_verify_negative_expire_time = 3d
address_verify_negative_refresh_time = 1h
address_verify_positive_refresh_time = 28d

# Параноя
disable_vrfy_command = yes 

#policy_time_limit = 3600

# I don't know why someone can needs more then this
smtpd_recipient_limit = 16

html_directory = /usr/share/doc/postfix-2.3.11/html