#++
# NAME
#	mongodb_table 5
# SUMMARY
#	Postfix MongoDB client configuration
# SYNOPSIS
#	\fBpostmap -q "\fIstring\fB" mongodb:/etc/postfix/\fIfilename\fR
#
#	\fBpostmap -q - mongodb:/etc/postfix/\fIfilename\fB <\fIinputfile\fR
# DESCRIPTION
#	The Postfix mail system uses optional tables for address
#	rewriting or mail routing. These tables are usually in
#	\fBlmdb:\fR, \fBcdb:\fR, \fBhash:\fR, or \fBdbm:\fR format.
#
#	Alternatively, lookup tables can be specified as MongoDB
#	databases.  
#	To find out what types of lookup tables your Postfix system
#	supports use the "\fBpostconf -m\fR" command.
#
#	In order to use MongoDB lookups, define a MongoDB
#	source as a lookup table in main.cf, for example:
# .nf
#	    alias_maps = mongodb:/etc/postfix/mongodb-aliases.cf
# .fi
#
#	In this example, the file /etc/postfix/mongodb-aliases.cf
#	has the same format as the Postfix main.cf file, and can
#	specify the parameters described below. It is also possible
#	to have the configuration in main.cf; see "OBSOLETE MAIN.CF
#	PARAMETERS" below.
#
#	It is strongly recommended to use proxy:mongodb, in order
#	to reduce the number of database connections. For example:
# .nf
#	    alias_maps = proxy:mongodb:/etc/postfix/mongodb-aliases.cf
# .fi
#
#	Note: when using proxy:mongodb:/\fIfile\fR, the file must
#	be readable by the unprivileged postfix user (specified
#	with the Postfix mail_owner configuration parameter).
# MONGODB PARAMETERS
# .ad
# .fi
# .IP "\fBuri\fR"
#	The URI of mongo server/cluster that Postfix will try to
#	connect to and query from. Please see
# .nf
#	https://www.mongodb.com/docs/manual/reference/connection-string/
# .fi
#
#	Example:
# .nf
#	    uri = mongodb+srv://user:pass@loclhost:27017/mail
# .fi
# .IP "\fBdbname\fR"
#	Name of the database to read the information from.
#	Example:
# .nf
#	    dbname = mail
# .fi
# .IP "\fBcollection\fR"
#	Name of the collection (table) to read the information from.
#	Example:
# .nf
#	    collection = mailbox
# .fi
# .IP "\fBquery_filter\fR"
#	The MongoDB query template used to search the database,
#	where \fB%s\fR is a substitute for the email address that
#	Postfix is trying to resolve. Please see:
# .nf
#	https://www.mongodb.com/docs/manual/tutorial/query-documents/
# .fi
#
#	Example:
# .nf
#	    query_filter = {"$or": [{"username": "%s"}, {"alias.address": "%s"}], "active": 1}
# .fi
#
#	This parameter supports the following '%' expansions:
# .RS
# .IP "\fB%%\fR"
#	This is replaced by a literal '%' character.
# .IP "\fB%s\fR"
#	This is replaced by the input key. The %s must appear in
#	quotes, because all Postfix queries are strings containing
#	(parts from) a domain or email address. Postfix makes no
#	numerical queries.
# .IP "\fB%u\fR"
#	When the input key is an address of the form user@domain,
#	\fB%u\fR is replaced by the local part of the address.
#	Otherwise, \fB%u\fR is replaced by the entire search string.
# .IP "\fB%d\fR"
#	When the input key is an address of the form user@domain,
#	\fB%d\fR is replaced by the domain part of the address.
# .IP "\fB%[1-9]\fR"
#	The patterns %1, %2, ... %9 are replaced by the corresponding
#	most significant component of the input key's domain. If
#	the input key is \fIuser@mail.example.com\fR, then %1 is
#	\fBcom\fR, %2 is \fBexample\fR and %3 is \fBmail\fR.
# .RE
# .IP
#	In the above substitutions, characters will be quoted as
#	required by RFC 4627. For example, each double quote or
#	backslash character will be escaped with a backslash
#	characacter.
# .IP "\fBprojection\fR"
#	Advanced MongoDB query projections. Please see:
# .nf
#	https://www.mongodb.com/docs/manual/tutorial/project-fields-from-query-results/
# .fi
#
# .RS
# .IP \(bu
#	If \fBprojection\fR is non-empty, then \fBresult_attribute\fR
#	must be empty.
# .IP \(bu
#	This implementation can extract information only from result
#	fields that have type \fBstring\fR (UTF8), \fBinteger\fR
#	(int32, int64) and \fBarray\fR. Other result fields will
#	be ignored with a warning. Please see:
# .nf
#	https://mongoc.org/libbson/current/bson_type_t.html
# .fi
# .IP \(bu
#	As with \fBresult_attribute\fR, the top-level _id field
#	(type OID) is automatically removed from projection results.
# .RE
# .IP "\fBresult_attribute\fR"
#	Comma or whitespace separated list with the names of fields
#	to be returned in a lookup result.
#
# .RS
# .IP \(bu
#	If \fBresult_attribute\fR is non-empty, then \fBprojection\fR
#	must be empty.
# .IP \(bu
#	As with \fBprojection\fR, the top-level _id field (type
#	OID) is automatically removed from lookup results.
# .RE
# .IP "\fBresult_format (default: \fB%s\fR)\fR"
#	Format template applied to the result from \fBprojection\fR
#	or \fBresult_attribute\fR. Most commonly used to append (or
#	prepend) text to the result. This parameter supports the
#	following '%' expansions:
# .RS
# .IP "\fB%%\fR"
#	This is replaced by a literal '%' character.
# .IP "\fB%s\fR"
#	This is replaced by the value of the result attribute. When
#	result is empty it is skipped.
# .IP "\fB%u\fR
#	When the result attribute value is an address of the form
#	user@domain, \fB%u\fR is replaced by the local part of the
#	address. When the result has an empty localpart it is
#	skipped.
# .IP "\fB%d\fR"
#	When a result attribute value is an address of the form
#	user@domain, \fB%d\fR is replaced by the domain part of the
#	attribute value. When the result is unqualified it is
#	skipped.
# .IP "\fB%[SUD1-9]\fR"
#	The upper-case and decimal digit expansions interpolate the
#	parts of the input key rather than the result. Their behavior
#	is identical to that described with \fBquery_filter\fR, and
#	in fact because the input key is known in advance, lookups
#	whose key does not contain all the information specified
#	in the result template are suppressed and return no results.
# .RE
# .IP
#	For example, using "result_format = smtp:[%s]" allows one
#	to use a mailHost attribute as the basis of a transport(5)
#	table. After applying the result format, multiple values
#	are concatenated as comma separated strings. The expansion_limit
#	parameter explained below allows one to restrict the number
#	of values in the result, which is especially useful for
#	maps that should return a single value.
#
#	The default value \fB%s\fR specifies that each
#	attribute value should be used as is.
#
#	NOTE: DO NOT put quotes around the result format! The result
#	is not a JSON string.
# .IP "\fBdomain (default: no domain list)\fR"
#	This is a list of domain names, paths to files, or "type:table"
#	databases. When specified, only fully qualified search keys
#	with a *non-empty* localpart and a matching domain are
#	eligible for lookup: 'user' lookups, bare domain lookups
#	and "@domain" lookups are not performed. This can significantly
#	reduce the query load on the backend database. Example:
# .nf
#	    domain = postfix.org, hash:/etc/postfix/searchdomains
# .fi
# .IP "\fBexpansion_limit (default: 0)\fR"
#	A limit on the total number of result elements returned (as
#	a comma separated list) by a lookup against the map.  A
#	setting of zero disables the limit. Lookups fail with a
#	temporary error if the limit is exceeded. Setting the limit
#	to 1 ensures that lookups do not return multiple values.
# OBSOLETE MAIN.CF PARAMETERS
# .ad
# .fi
#	MongoDB parameters can also be defined in main.cf. Specify
#	as MongoDB source a name that doesn't begin with a slash
#	or a dot. The MongoDB parameters will then be accessible
#	as the name you've given the source in its definition, an
#	underscore, and the name of the parameter. For example, if
#	a map is specified as "mongodb:\fImongodb_source\fR", the
#	"uri" parameter would be defined in main.cf as
#	"\fImongodb_source\fR_uri".
#
#	Note: with this form, passwords are written in main.cf,
#	which is normally world-readable, and '$' in a mongodb
#	parameter setting needs to be written as '$$'.
# SEE ALSO
#	postmap(1), Postfix lookup table maintenance
#	postconf(5), configuration parameters
# README FILES
# .ad
# .fi
#	Use "\fBpostconf readme_directory\fR" or "\fBpostconf
#	html_directory\fR" to locate this information.
# .na
# .nf
#	DATABASE_README, Postfix lookup table overview
#	MONGODB_README, Postfix MONGODB client guide
# LICENSE
# .ad
# .fi
#	The Secure Mailer license must be distributed with this software.
# HISTORY
#	MongoDB support was introduced with Postfix version 3.9.
# AUTHOR(S)
#	Hamid Maadani (hamid@dexo.tech)
#	Dextrous Technologies, LLC
#
#	Edited by:
#	Wietse Venema
#	porcupine.org
#
#	Based on prior work by:
#	Stephan Ferraro
#	Aionda GmbH
#--
