This file is indexed.

/etc/courier/authpgsqlrc is in courier-authlib-postgresql 0.63.0-6ubuntu1.

This file is owned by daemon:daemon, with mode 0o660.

The actual contents of the file can be viewed below.

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##VERSION: $Id: authpgsqlrc,v 1.13 2008/12/18 12:08:25 mrsam Exp $
#
# Copyright 2000-2004 Double Precision, Inc.  See COPYING for
# distribution information.
#
# Do not alter lines that begin with ##, they are used when upgrading
# this configuration.
#
# authpgsqlrc created from authpgsqlrc.dist by sysconftool
#
# DO NOT INSTALL THIS FILE with world read permissions.  This file
# might contain the PostgreSQL admin password!
#
# Each line in this file must follow the following format:
#
# field[spaces|tabs]value
#
# That is, the name of the field, followed by spaces or tabs, followed by
# field value.  Trailing spaces are prohibited.


##NAME: LOCATION:0
#
# The server hostname, port, userid, and password used to log in.
#
# To connect to a filesystem socket, delete PGSQL_HOST, and set PGSQL_PORT to
# the socket's last component.  So, if your pg socket is /tmp/.s.PGSQL.5400
# set PGSQL_PORT to 5400.

PGSQL_HOST		pgsql.example.com
PGSQL_PORT		5400
PGSQL_USERNAME		admin
PGSQL_PASSWORD		admin


##NAME: PGSQL_OPT:0
#
# PGSQL_OPT specifies the connection debug options to PQsetdbLogin().
# Don't bother with this setting unless you know what you're doing
#
# PGSQL_OPT		

##NAME: PGSQL_DATABASE:0
#
# The name of the PostgreSQL database we will open:

PGSQL_DATABASE		template1

##NAME: PGSQL_CHARACTER_SET:0
#
# Optionally install a character set mapping. Restart authdaemond, send a test
# query using authtest and check for error messages in syslog/maillog.
#
# PGSQL_CHARACTER_SET	UTF8

##NAME: PGSQL_USER_TABLE:0
#
# The name of the table containing your user data.  See README.authmysqlrc
# for the required fields in this table (both MySQL and Postgress use the
# same suggested layout.

PGSQL_USER_TABLE	passwd

##NAME: PGSQL_CRYPT_PWFIELD:0
#
# Either PGSQL_CRYPT_PWFIELD or PGSQL_CLEAR_PWFIELD must be defined.  Both
# are OK too. crypted passwords go into PGSQL_CRYPT_PWFIELD, cleartext
# passwords go into PGSQL_CLEAR_PWFIELD.  Cleartext passwords allow
# CRAM-MD5 authentication to be implemented.

PGSQL_CRYPT_PWFIELD	crypt

##NAME: PGSQL_CLEAR_PWFIELD:0
#
#
# PGSQL_CLEAR_PWFIELD	clear

##NAME: PGSQL_DEFAULT_DOMAIN:0
#
# If DEFAULT_DOMAIN is defined, and someone tries to log in as 'user',
# we will look up 'user@DEFAULT_DOMAIN' instead.
#
#
# DEFAULT_DOMAIN		example.com

##NAME: PGSQL_UID_FIELD:0
#
# Other fields in the mysql table:
#
# PGSQL_UID_FIELD - contains the numerical userid of the account
#
PGSQL_UID_FIELD		uid

##NAME: PGSQL_GID_FIELD:0
#
# Numerical groupid of the account

PGSQL_GID_FIELD		gid

##NAME: PGSQL_LOGIN_FIELD:0
#
# The login id, default is id.  Basically the query is:
#
#  SELECT PGSQL_UID_FIELD, PGSQL_GID_FIELD, ... WHERE id='loginid'
#

PGSQL_LOGIN_FIELD	id

##NAME: PGSQL_HOME_FIELD:0
#

PGSQL_HOME_FIELD	home

##NAME: PGSQL_NAME_FIELD:0
#
# The user's name (optional)

PGSQL_NAME_FIELD	name

##NAME: PGSQL_MAILDIR_FIELD:0
#
# This is an optional field, and can be used to specify an arbitrary
# location of the maildir for the account, which normally defaults to
# $HOME/Maildir (where $HOME is read from PGSQL_HOME_FIELD).
#
# You still need to provide a PGSQL_HOME_FIELD, even if you uncomment this
# out.
#
# PGSQL_MAILDIR_FIELD	maildir

##NAME: PGSQL_DEFAULTDELIVERY:0
#
# Courier mail server only: optional field specifies custom mail delivery
# instructions for this account (if defined) -- essentially overrides
# DEFAULTDELIVERY from ${sysconfdir}/courierd
#
# PGSQL_DEFAULTDELIVERY defaultDelivery

##NAME: PGSQL_QUOTA_FIELD:0
#
# Define PGSQL_QUOTA_FIELD to be the name of the field that can optionally
# specify a maildir quota.  See README.maildirquota for more information 
#
# PGSQL_QUOTA_FIELD	quota

##NAME: PGSQL_AUXOPTIONS:0
#
# Auxiliary options.  The PGSQL_AUXOPTIONS field should be a char field that
# contains a single string consisting of comma-separated "ATTRIBUTE=NAME"
# pairs.  These names are additional attributes that define various per-account
# "options", as given in  INSTALL's description of the "Account OPTIONS"
# setting.
#
# PGSQL_AUXOPTIONS_FIELD	auxoptions
#
# You might want to try something like this, if you'd like to use a bunch
# of individual fields, instead of a single text blob:
#
# PGSQL_AUXOPTIONS_FIELD	'disableimap=' || disableimap || ',disablepop3=' || disablepop3 || ',disablewebmail=' || disablewebmail || ',sharedgroup=' || sharedgroup
#
# This will let you define fields called "disableimap", etc, with the end result
# being something that the OPTIONS parser understands.

##NAME: PGSQL_WHERE_CLAUSE:0
#
# This is optional, PGSQL_WHERE_CLAUSE can be basically set to an arbitrary
# fixed string that is appended to the WHERE clause of our query
#
# PGSQL_WHERE_CLAUSE	server='mailhost.example.com'

##NAME: PGSQL_SELECT_CLAUSE:0
#
# (EXPERIMENTAL)
# This is optional, PGSQL_SELECT_CLAUSE can be set when you have a database,
# which is structuraly different from proposed. The fixed string will
# be used to do a SELECT operation on database, which should return fields
# in order specified bellow:
#
# username, cryptpw, clearpw, uid, gid, home, maildir, quota, fullname, options
#
# Enabling this option causes ignorance of any other field-related
# options, excluding default domain.
#
# There are two variables, which you can use. Substitution will be made
# for them, so you can put entered username (local part) and domain name
# in the right place of your query. These variables are:
#	 	$(local_part), $(domain), and $(service)
#
# If a $(domain) is empty (not given by the remote user) the default domain
# name is used in its place.
#
# $(service) will expand out to the service being authenticated: imap, imaps,
# pop3 or pop3s.  Courier mail server only: service will also expand out to
# "courier", when searching for local mail account's location.  In this case,
# if the "maildir" field is not empty it will be used in place of
# DEFAULTDELIVERY.  Courier mail server will also use esmtp when doing
# authenticated ESMTP.
#
# This example is a little bit modified adaptation of vmail-sql
# database scheme:
#
# PGSQL_SELECT_CLAUSE	SELECT popbox.local_part,			\
#			'{MD5}' || popbox.password_hash,		\
#			popbox.clearpw,					\
#			domain.uid,					\
#			domain.gid,					\
#			domain.path || '/' || popbox.mbox_name),	\
#			'',						\
#			domain.quota,					\
#			'',						\
#			FROM popbox, domain				\
#			WHERE popbox.local_part = '$(local_part)'	\
#			AND popbox.domain_name = '$(domain)'		\
#			AND popbox.domain_name = domain.domain_name


##NAME: PGSQL_ENUMERATE_CLAUSE:1
#
# {EXPERIMENTAL}
# Optional custom SQL query used to enumerate accounts for authenumerate,
# in order to compile a list of accounts for shared folders.  The query
# should return the following fields: name, uid, gid, homedir, maildir, options
#
# Example:
# PGSQL_ENUMERATE_CLAUSE	SELECT popbox.local_part || '@' || popbox.domain_name,	\
#			domain.uid,					\
#			domain.gid,					\
#			domain.path || '/' || popbox.mbox_name,		\
#			'',						\
#			'sharedgroup=' || sharedgroup			\
#			FROM popbox, domain				\
#			WHERE popbox.local_part = '$(local_part)'	\
#			AND popbox.domain_name = '$(domain)'		\
#			AND popbox.domain_name = domain.domain_name


##NAME: PGSQL_CHPASS_CLAUSE:0
#
# (EXPERIMENTAL)
# This is optional, PGSQL_CHPASS_CLAUSE can be set when you have a database,
# which is structuraly different from proposed. The fixed string will
# be used to do an UPDATE operation on database. In other words, it is
# used, when changing password.
#
# There are four variables, which you can use. Substitution will be made
# for them, so you can put entered username (local part) and domain name
# in the right place of your query. There variables are:
# 	$(local_part) , $(domain) , $(newpass) , $(newpass_crypt)
#
# If a $(domain) is empty (not given by the remote user) the default domain
# name is used in its place.
# $(newpass) contains plain password
# $(newpass_crypt) contains its crypted form
#
# PGSQL_CHPASS_CLAUSE	UPDATE	popbox					\
#			SET	clearpw='$(newpass)',			\
#				password_hash='$(newpass_crypt)'	\
#			WHERE	local_part='$(local_part)'		\
#			AND	domain_name='$(domain)'
#