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.\" $OpenBSD: makemap.8,v 1.26 2015/12/11 07:10:06 guenther Exp $
.\"
.\" Copyright (c) 2009 Jacek Masiulaniec <jacekm@openbsd.org>
.\" Copyright (c) 2008-2009 Gilles Chehade <gilles@poolp.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: December 11 2015 $
.Dt MAKEMAP 8
.Os
.Sh NAME
.Nm makemap
.Nd create database maps for smtpd
.Sh SYNOPSIS
.Nm makemap
.Op Fl U
.Op Fl o Ar dbfile
.Op Fl t Ar type
.Ar file
.Sh DESCRIPTION
Maps provide a generic interface for associating textual key to a value.
Such associations may be accessed through a plaintext file, database, or DNS.
The format of these file types is described below.
.Nm
itself creates the database maps used by keyed map lookups specified in
.Xr smtpd.conf 5 .
.Pp
.Nm
reads input from
.Ar file
and writes data to a file whose name is made by adding a
.Dq .db
suffix to
.Ar file .
The current line can be extended over multiple lines using a backslash
.Pq Sq \e .
Comments can be put anywhere in the file using a hash mark
.Pq Sq # ,
and extend to the end of the current line.
Care should be taken when commenting out multi-line text:
the comment is effective until the end of the entire block.
In all cases,
.Nm
reads lines consisting of words separated by whitespace.
The first word of a line is the database key;
the remainder represents the mapped value.
The database key and value may optionally be separated
by the colon character.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl o Ar dbfile
Write the generated database to
.Ar dbfile .
.It Fl t Ar type
Specify the format of the resulting map file.
The default map format is suitable for storing simple, unstructured,
key-to-value string associations.
However, if the mapped value has special meaning,
as in the case of the virtual domains file,
a suitable
.Ar type
must be provided.
The available output types are:
.Bl -tag -width "aliases"
.It Cm aliases
The mapped value is a comma-separated list of mail destinations.
This format can be used for building user aliases and
user mappings for virtual domain files.
.It Cm set
There is no mapped value \(en a map of this type will only allow for
the lookup of keys.
This format can be used for building primary domain maps.
.El
.It Fl U
Instead of generating a database map from text input,
dump the contents of a database map as text
with the key and value separated with a tab.
.El
.Sh PRIMARY DOMAINS
Primary domains can be kept in tables.
To create a primary domain table, add each primary domain on a
single line by itself.
.Pp
In addition to adding an entry to the primary domain map,
one must add a filter rule that accepts mail for the domain
map, for example:
.Bd -literal -offset indent
table domains "/etc/mail/domains"
accept for domain <domains> deliver to mbox
.Ed
.Sh VIRTUAL DOMAINS
Virtual domains may also be kept in tables.
To create a virtual domain table, add each virtual domain on a
single line by itself.
.Pp
Virtual domains expect a mapping of virtual users to real users
in order to determine if a recipient is accepted or not.
The mapping format is an extension to
.Xr aliases 5 ,
which allows the use of
.Dq user@domain.tld
to accept user only on the specified domain,
.Dq user
to accept the user for any of the virtual domains,
.Dq @domain.tld
to provide a catch-all for the specified domain and
.Dq @
to provide a global catch-all for all domains.
.Xr smtpd 8
will perform the lookups in that specific order.
.Pp
To create single virtual address, add
.Dq user@example.com user
to the users map.
To handle all mail destined to any user at example.com, add
.Dq @example.com user
to the virtual map.
.Pp
In addition to adding an entry to the virtual map,
one must add a filter rule that accepts mail for virtual domains,
for example:
.Bd -literal -offset indent
table vdomains "/etc/mail/vdomains"
table vusers "/etc/mail/users"
accept for domain <vdomains> virtual <vusers> deliver to mbox
accept for domain example.org virtual <vusers> deliver to mbox
.Ed
.Sh FILES
.Bl -tag -width "/etc/mail/aliasesXXX" -compact
.It Pa /etc/mail/aliases
List of user mail aliases.
.It Pa /etc/mail/secrets
List of remote host credentials.
.El
.Sh EXIT STATUS
.Ex -std makemap
.Sh SEE ALSO
.Xr aliases 5 ,
.Xr smtpd.conf 5 ,
.Xr table 5 ,
.Xr newaliases 8 ,
.Xr smtpd 8
.Sh HISTORY
The
.Nm
command first appeared in
.Ox 4.6
as a replacement for the equivalent command shipped with sendmail.
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