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#++
# NAME
# access 5
# SUMMARY
# format of Postfix access table
# SYNOPSIS
# \fBpostmap /etc/postfix/access\fR
#
# \fBpostmap -q "\fIstring\fB" /etc/postfix/access\fR
#
# \fBpostmap -q - /etc/postfix/access <\fIinputfile\fR
# DESCRIPTION
# The optional \fBaccess\fR 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 \fBaccess\fR table is specified as a text file
# that serves as input to the \fBpostmap\fR(1) command.
# The result, an indexed file in \fBdbm\fR or \fBdb\fR format,
# is used for fast searching by the mail system. Execute the command
# \fBpostmap /etc/postfix/access\fR 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 expressions. In that case,
# the lookups are done in a slightly different way as described below.
# TABLE FORMAT
# .ad
# .fi
# The format of the access table is as follows:
# .IP "\fIpattern action\fR"
# When \fIpattern\fR matches a mail address, domain or host address,
# perform the corresponding \fIaction\fR.
# .IP "blank lines and comments"
# Empty lines and whitespace-only lines are ignored, as
# are lines whose first non-whitespace character is a `#'.
# .IP "multi-line text"
# A logical line starts with non-whitespace text. A line that
# starts with whitespace continues a logical line.
# EMAIL ADDRESS PATTERNS
# .ad
# .fi
# 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:
# .IP \fIuser\fR@\fIdomain\fR
# Matches the specified mail address.
# .IP \fIdomain.tld\fR
# Matches \fIdomain.tld\fR as the domain part of an email address.
# .sp
# The pattern \fIdomain.tld\fR also matches subdomains, but only
# when the string \fBsmtpd_access_maps\fR is listed in the Postfix
# \fBparent_domain_matches_subdomains\fR configuration setting.
# Otherwise, specify \fI.domain.tld\fR (note the initial dot) in
# order to match subdomains.
# .IP \fIuser\fR@
# Matches all mail addresses with the specified user part.
# .PP
# Note: lookup of the null sender address is not possible with
# some types of lookup table. By default, Postfix uses \fB<>\fR
# as the lookup key for such addresses. The value is specified with
# the \fBsmtpd_null_access_lookup_key\fR parameter in the Postfix
# \fBmain.cf\fR file.
# ADDRESS EXTENSION
# .fi
# .ad
# When a mail address localpart contains the optional recipient delimiter
# (e.g., \fIuser+foo\fR@\fIdomain\fR), the lookup order becomes:
# \fIuser+foo\fR@\fIdomain\fR, \fIuser\fR@\fIdomain\fR, \fIdomain\fR,
# \fIuser+foo\fR@, and \fIuser\fR@.
# HOST NAME/ADDRESS PATTERNS
# .ad
# .fi
# 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:
# .IP \fIdomain.tld\fR
# Matches \fIdomain.tld\fR.
# .sp
# The pattern \fIdomain.tld\fR also matches subdomains, but only
# when the string \fBsmtpd_access_maps\fR is listed in the Postfix
# \fBparent_domain_matches_subdomains\fR configuration setting.
# Otherwise, specify \fI.domain.tld\fR (note the initial dot) in
# order to match subdomains.
# .IP \fInet.work.addr.ess\fR
# .IP \fInet.work.addr\fR
# .IP \fInet.work\fR
# .IP \fInet\fR
# Matches any host address in the specified network. A network
# address is a sequence of one or more octets separated by ".".
# ACTIONS
# .ad
# .fi
# .IP "[\fB45\fR]\fINN text\fR"
# Reject the address etc. that matches the pattern, and respond with
# the numerical code and text.
# .IP \fBREJECT\fR
# .IP "\fBREJECT \fIoptional text...\fR
# Reject the address etc. that matches the pattern. Reply with
# \fI$reject_code optional text...\fR when the optional text is
# specified, otherwise reply with a generic error response message.
# .IP \fBOK\fR
# Accept the address etc. that matches the pattern.
# .IP \fIall-numerical\fR
# An all-numerical result is treated as OK. This format is
# generated by address-based relay authorization schemes.
# .IP \fBDUNNO\fR
# 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).
# .IP \fBHOLD\fR
# .IP "\fBHOLD \fIoptional text...\fR"
# Place the message on the \fBhold\fR 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
# \fBpostcat\fR(1) command, and can be destroyed or released with
# the \fBpostsuper\fR(1) command.
# .sp
# Note: this action currently affects all recipients of the message.
# .IP \fBDISCARD\fR
# .IP "\fBDISCARD \fIoptional text...\fR
# Claim successful delivery and silently discard the message.
# Log the optional text if specified, otherwise log a generic
# message.
# .sp
# Note: this action currently affects all recipients of the message.
# .IP "\fBFILTER \fItransport:destination\fR"
# After the message is queued, send the entire message through
# a content filter. More information about content filters
# is in the Postfix FILTER_README file.
# .sp
# Note: this action overrides the \fBmain.cf content_filter\fR setting,
# and currently affects all recipients of the message.
# .IP \fIrestriction...\fR
# Apply the named UCE restriction(s) (\fBpermit\fR, \fBreject\fR,
# \fBreject_unauth_destination\fR, and so on).
# REGULAR EXPRESSION TABLES
# .ad
# .fi
# 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 \fBregexp_table\fR(5)
# or \fBpcre_table\fR(5).
#
# Each pattern is a regular expression that is applied to the entire
# string being looked up. Depending on the application, 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, \fIuser@domain\fR mail addresses are not broken up into
# their \fIuser@\fR and \fIdomain\fR constituent parts, nor is
# \fIuser+foo\fR broken up into \fIuser\fR and \fIfoo\fR.
#
# 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 \fB$1\fR, \fB$2\fR 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
# .ad
# .fi
# 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
#--
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