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+#++
+# NAME
+# generic 5
+# SUMMARY
+# Postfix generic table format
+# SYNOPSIS
+# \fBpostmap /etc/postfix/generic\fR
+#
+# \fBpostmap -q "\fIstring\fB" /etc/postfix/generic\fR
+#
+# \fBpostmap -q - /etc/postfix/generic <\fIinputfile\fR
+# DESCRIPTION
+# The optional \fBgeneric\fR(5) table specifies an address
+# mapping that applies when mail is delivered. This is the
+# opposite of \fBcanonical\fR(5) mapping, which applies when
+# mail is received.
+#
+# Typically, one would use the \fBgeneric\fR(5) table on a
+# system that does not have a valid Internet domain name and
+# that uses something like \fIlocaldomain.local\fR instead.
+# The \fBgeneric\fR(5) table is then used by the \fBsmtp\fR(8)
+# client to transform local mail addresses into valid Internet
+# mail addresses when mail has to be sent across the Internet.
+# See the EXAMPLE section at the end of this document.
+#
+# The \fBgeneric\fR(5) mapping affects both message header
+# addresses (i.e. addresses that appear inside messages) and
+# message envelope addresses (for example, the addresses that
+# are used in SMTP protocol commands).
+#
+# Normally, the \fBgeneric\fR(5) 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/generic\fR"
+# to rebuild an indexed file after changing the corresponding
+# text file.
+#
+# 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, or lookups
+# can be directed to TCP-based server. In those case, the lookups
+# are done in a slightly different way as described below under
+# "REGULAR EXPRESSION TABLES" or "TCP-BASED TABLES".
+# CASE FOLDING
+# .ad
+# .fi
+# The search string is folded to lowercase before database
+# lookup. As of Postfix 2.3, the search string is not case
+# folded with database types such as regexp: or pcre: whose
+# lookup fields can match both upper and lower case.
+# TABLE FORMAT
+# .ad
+# .fi
+# The input format for the \fBpostmap\fR(1) command is as follows:
+# .IP "\fIpattern result\fR"
+# When \fIpattern\fR matches a mail address, replace it by the
+# corresponding \fIresult\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.
+# TABLE SEARCH ORDER
+# .ad
+# .fi
+# With lookups from indexed files such as DB or DBM, or from networked
+# tables such as NIS, LDAP or SQL, each \fIuser\fR@\fIdomain\fR
+# query produces a sequence of query patterns as described below.
+#
+# Each query pattern is sent to each specified lookup table
+# before trying the next query pattern, until a match is
+# found.
+# .IP "\fIuser\fR@\fIdomain address\fR"
+# Replace \fIuser\fR@\fIdomain\fR by \fIaddress\fR. This form
+# has the highest precedence.
+# .IP "\fIuser address\fR"
+# Replace \fIuser\fR@\fIsite\fR by \fIaddress\fR when \fIsite\fR is
+# equal to $\fBmyorigin\fR, when \fIsite\fR is listed in
+# $\fBmydestination\fR, or when it is listed in $\fBinet_interfaces\fR
+# or $\fBproxy_interfaces\fR.
+# .IP "@\fIdomain address\fR"
+# Replace other addresses in \fIdomain\fR by \fIaddress\fR.
+# This form has the lowest precedence.
+# RESULT ADDRESS REWRITING
+# .ad
+# .fi
+# The lookup result is subject to address rewriting:
+# .IP \(bu
+# When the result has the form @\fIotherdomain\fR, the
+# result becomes the same \fIuser\fR in \fIotherdomain\fR.
+# .IP \(bu
+# When "\fBappend_at_myorigin=yes\fR", append "\fB@$myorigin\fR"
+# to addresses without "@domain".
+# .IP \(bu
+# When "\fBappend_dot_mydomain=yes\fR", append
+# "\fB.$mydomain\fR" to addresses without ".domain".
+# 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, \fIuser+foo\fR,
+# \fIuser\fR, and @\fIdomain\fR.
+#
+# The \fBpropagate_unmatched_extensions\fR parameter controls whether
+# an unmatched address extension (\fI+foo\fR) is propagated to the
+# result of table lookup.
+# 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
+# address being looked up. Thus, \fIuser@domain\fR mail addresses are not
+# broken up into their \fIuser\fR and \fI@domain\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.
+#
+# Results 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.
+# TCP-BASED TABLES
+# .ad
+# .fi
+# This section describes how the table lookups change when lookups
+# are directed to a TCP-based server. For a description of the TCP
+# client/server lookup protocol, see \fBtcp_table\fR(5).
+# This feature is not available up to and including Postfix version 2.4.
+#
+# Each lookup operation uses the entire address once. Thus,
+# \fIuser@domain\fR mail addresses are not broken up into their
+# \fIuser\fR and \fI@domain\fR constituent parts, nor is
+# \fIuser+foo\fR broken up into \fIuser\fR and \fIfoo\fR.
+#
+# Results are the same as with indexed file lookups.
+# EXAMPLE
+# .ad
+# .fi
+# The following shows a generic mapping with an indexed file.
+# When mail is sent to a remote host via SMTP, this replaces
+# \fIhis@localdomain.local\fR by his ISP mail address, replaces
+# \fIher@localdomain.local\fR by her ISP mail address, and
+# replaces other local addresses by his ISP account, with
+# an address extension of \fI+local\fR (this example assumes
+# that the ISP supports "+" style address extensions).
+#
+# .na
+# .nf
+# /etc/postfix/main.cf:
+# smtp_generic_maps = hash:/etc/postfix/generic
+#
+# /etc/postfix/generic:
+# his@localdomain.local hisaccount@hisisp.example
+# her@localdomain.local heraccount@herisp.example
+# @localdomain.local hisaccount+local@hisisp.example
+#
+# .ad
+# .fi
+# Execute the command "\fBpostmap /etc/postfix/generic\fR"
+# whenever the table is changed. Instead of \fBhash\fR, some
+# systems use \fBdbm\fR database files. To find out what
+# tables your system supports use the command "\fBpostconf
+# -m\fR".
+# BUGS
+# The table format does not understand quoting conventions.
+# CONFIGURATION PARAMETERS
+# .ad
+# .fi
+# The following \fBmain.cf\fR parameters are especially relevant.
+# The text below provides only a parameter summary. See
+# \fBpostconf\fR(5) for more details including examples.
+# .IP \fBsmtp_generic_maps\fR
+# Address mapping lookup table for envelope and header sender
+# and recipient addresses while delivering mail via SMTP.
+# .IP \fBpropagate_unmatched_extensions\fR
+# A list of address rewriting or forwarding mechanisms that propagate
+# an address extension from the original address to the result.
+# Specify zero or more of \fBcanonical\fR, \fBvirtual\fR, \fBalias\fR,
+# \fBforward\fR, \fBinclude\fR, or \fBgeneric\fR.
+# .PP
+# Other parameters of interest:
+# .IP \fBinet_interfaces\fR
+# The network interface addresses that this system receives mail on.
+# You need to stop and start Postfix when this parameter changes.
+# .IP \fBproxy_interfaces\fR
+# Other interfaces that this machine receives mail on by way of a
+# proxy agent or network address translator.
+# .IP \fBmydestination\fR
+# List of domains that this mail system considers local.
+# .IP \fBmyorigin\fR
+# The domain that is appended to locally-posted mail.
+# .IP \fBowner_request_special\fR
+# Give special treatment to \fBowner-\fIxxx\fR and \fIxxx\fB-request\fR
+# addresses.
+# SEE ALSO
+# postmap(1), Postfix lookup table manager
+# postconf(5), configuration parameters
+# smtp(8), Postfix SMTP client
+# README FILES
+# .ad
+# .fi
+# Use "\fBpostconf readme_directory\fR" or
+# "\fBpostconf html_directory\fR" to locate this information.
+# .na
+# .nf
+# ADDRESS_REWRITING_README, address rewriting guide
+# DATABASE_README, Postfix lookup table overview
+# STANDARD_CONFIGURATION_README, configuration examples
+# LICENSE
+# .ad
+# .fi
+# The Secure Mailer license must be distributed with this software.
+# HISTORY
+# A genericstable feature appears in the Sendmail MTA.
+#
+# This feature is available in Postfix 2.2 and later.
+# AUTHOR(S)
+# Wietse Venema
+# IBM T.J. Watson Research
+# P.O. Box 704
+# Yorktown Heights, NY 10598, USA
+#
+# Wietse Venema
+# Google, Inc.
+# 111 8th Avenue
+# New York, NY 10011, USA
+#--