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# ACCESS(5) ACCESS(5)
#
# NAME
# access - format of Postfix access table
#
# SYNOPSIS
# postmap /etc/postfix/access
#
# postmap -q "string" /etc/postfix/access
#
# postmap -q - /etc/postfix/access <inputfile
#
# DESCRIPTION
# The optional access table directs the Postfix SMTP server
# to selectively reject or accept mail. Access can be
# allowed or denied for specific host names, domain names,
# networks, host network addresses or mail addresses.
#
# Normally, the access table is specified as a text file
# that serves as input to the postmap(1) command. The
# result, an indexed file in dbm or db format, is used for
# fast searching by the mail system. Execute the command
# postmap /etc/postfix/access in order to rebuild the
# indexed file after changing the access table.
#
# When the table is provided via other means such as NIS,
# LDAP or SQL, the same lookups are done as for ordinary
# indexed files.
#
# Alternatively, the table can be provided as a regular-
# expression map where patterns are given as regular expres-
# sions. In that case, the lookups are done in a slightly
# different way as described below.
#
# TABLE FORMAT
# The format of the access table is as follows:
#
# pattern action
# When pattern matches a mail address, domain or host
# address, perform the corresponding action.
#
# blank lines and comments
# Empty lines and whitespace-only lines are ignored,
# as are lines whose first non-whitespace character
# is a `#'.
#
# multi-line text
# A logical line starts with non-whitespace text. A
# line that starts with whitespace continues a logi-
# cal line.
#
# EMAIL ADDRESS PATTERNS
# With lookups from indexed files such as DB or DBM, or from
# networked tables such as NIS, LDAP or SQL, the following
# lookup patterns are examined in the order as listed:
#
# user@domain
# Matches the specified mail address.
#
# domain.tld
# Matches domain.tld as the domain part of an email
# address.
#
# The pattern domain.tld also matches subdomains, but
# only when the string smtpd_access_maps is listed in
# the Postfix parent_domain_matches_subdomains con-
# figuration setting. Otherwise, specify .domain.tld
# (note the initial dot) in order to match subdo-
# mains.
#
# user@ Matches all mail addresses with the specified user
# part.
#
# Note: lookup of the null sender address is not possible
# with some types of lookup table. By default, Postfix uses
# <> as the lookup key for such addresses. The value is
# specified with the smtpd_null_access_lookup_key parameter
# in the Postfix main.cf file.
#
# ADDRESS EXTENSION
# When a mail address localpart contains the optional recip-
# ient delimiter (e.g., user+foo@domain), the lookup order
# becomes: user+foo@domain, user@domain, domain, user+foo@,
# and user@.
#
# HOST NAME/ADDRESS PATTERNS
# With lookups from indexed files such as DB or DBM, or from
# networked tables such as NIS, LDAP or SQL, the following
# lookup patterns are examined in the order as listed:
#
# domain.tld
# Matches domain.tld.
#
# The pattern domain.tld also matches subdomains, but
# only when the string smtpd_access_maps is listed in
# the Postfix parent_domain_matches_subdomains con-
# figuration setting. Otherwise, specify .domain.tld
# (note the initial dot) in order to match subdo-
# mains.
#
# net.work.addr.ess
#
# net.work.addr
#
# net.work
#
# net Matches any host address in the specified network.
# A network address is a sequence of one or more
# octets separated by ".".
#
# ACTIONS
# [45]NN text
# Reject the address etc. that matches the pattern,
# and respond with the numerical code and text.
#
# REJECT
#
# REJECT optional text...
# Reject the address etc. that matches the pattern.
# Reply with $reject_code optional text... when the
# optional text is specified, otherwise reply with a
# generic error response message.
#
# OK Accept the address etc. that matches the pattern.
#
# all-numerical
# An all-numerical result is treated as OK. This for-
# mat is generated by address-based relay authoriza-
# tion schemes.
#
# DUNNO Pretend that the lookup key was not found in this
# table. This prevents Postfix from trying substrings
# of the lookup key (such as a subdomain name, or a
# network address subnetwork).
#
# HOLD
#
# HOLD optional text...
# Place the message on the hold queue, where it will
# sit until someone either deletes it or releases it
# for delivery. Log the optional text if specified,
# otherwise log a generic message.
#
# Mail that is placed on hold can be examined with
# the postcat(1) command, and can be destroyed or
# released with the postsuper(1) command.
#
# Note: this action currently affects all recipients
# of the message.
#
# DISCARD
#
# DISCARD optional text...
# Claim successful delivery and silently discard the
# message. Log the optional text if specified, oth-
# erwise log a generic message.
#
# Note: this action currently affects all recipients
# of the message.
#
# FILTER transport:destination
# After the message is queued, send the entire mes-
# sage through a content filter. More information
# about content filters is in the Postfix FIL-
# TER_README file.
#
# Note: this action overrides the main.cf con-
# tent_filter setting, and currently affects all
# recipients of the message.
#
# restriction...
# Apply the named UCE restriction(s) (permit, reject,
# reject_unauth_destination, and so on).
#
# REGULAR EXPRESSION TABLES
# This section describes how the table lookups change when
# the table is given in the form of regular expressions. For
# a description of regular expression lookup table syntax,
# see regexp_table(5) or pcre_table(5).
#
# Each pattern is a regular expression that is applied to
# the entire string being looked up. Depending on the appli-
# cation, that string is an entire client hostname, an
# entire client IP address, or an entire mail address. Thus,
# no parent domain or parent network search is done,
# user@domain mail addresses are not broken up into their
# user@ and domain constituent parts, nor is user+foo broken
# up into user and foo.
#
# Patterns are applied in the order as specified in the
# table, until a pattern is found that matches the search
# string.
#
# Actions are the same as with indexed file lookups, with
# the additional feature that parenthesized substrings from
# the pattern can be interpolated as $1, $2 and so on.
#
# BUGS
# The table format does not understand quoting conventions.
#
# SEE ALSO
# postmap(1) create mapping table
# smtpd(8) smtp server
# pcre_table(5) format of PCRE tables
# regexp_table(5) format of POSIX regular expression tables
#
# LICENSE
# The Secure Mailer license must be distributed with this
# software.
#
# AUTHOR(S)
# Wietse Venema
# IBM T.J. Watson Research
# P.O. Box 704
# Yorktown Heights, NY 10598, USA
#
# ACCESS(5)
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