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doc: Update exim service documentation.

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* doc/guix.texi (Mail Services): Update exim service documentation to remove
mail-aliases, add mail-aliases-service-type documentation.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
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Carlo Zancanaro 2017-04-19 23:58:24 +10:00 committed by Ludovic Courtès
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@ -12654,19 +12654,26 @@ remote servers. Run @command{man smtpd.conf} for more information.
@subsubheading Exim Service
@cindex mail transfer agent (MTA)
@cindex MTA (mail transfer agent)
@cindex SMTP
@deffn {Scheme Variable} exim-service-type
This is the type of the @uref{https://exim.org, Exim} service, whose value
should be an @code{exim-configuration} object as in this example:
This is the type of the @uref{https://exim.org, Exim} mail transfer
agent (MTA), whose value should be an @code{exim-configuration} object
as in this example:
@example
(service exim-service-type
(exim-configuration
(config-file (local-file "./my-exim.conf"))
(aliases '(("postmaster" "bob")
("bob" "bob@@example.com" "bob@@example2.com")))))
(config-file (local-file "./my-exim.conf"))))
@end example
@end deffn
In order to use an @code{exim-service-type} service you must also have a
@code{mail-aliases-service-type} service present in your
@code{operating-system} (even if it has no aliases).
@deftp {Data Type} exim-configuration
Data type representing the configuration of exim.
@ -12681,16 +12688,37 @@ provided in @code{package}. The resulting configuration file is loaded
after setting the @code{exim_user} and @code{exim_group} configuration
variables.
@item @code{aliases} (default: @code{'()})
List of aliases to use when delivering mail on this system. The
@code{car} of each list is used to match incoming mail, with the
@code{cdr} of each list designating how to deliver it. There may be many
delivery methods provided, in which case the mail is delivered to them
all.
@end table
@end deftp
@subsubheading Mail Aliases Service
@cindex email aliases
@cindex aliases, for email addresses
@deffn {Scheme Variable} mail-aliases-service-type
This is the type of the service which provides @code{/etc/aliases},
specifying how to deliver mail to users on this system.
@example
(service mail-aliases-service-type
'(("postmaster" "bob")
("bob" "bob@@example.com" "bob@@example2.com")))
@end example
@end deffn
The configuration for a @code{mail-aliases-service-type} service is an
association list denoting how to deliver mail that comes to this
system. Each entry is of the form @code{(alias addresses ...)}, with
@code{alias} specifying the local alias and @code{addresses} specifying
where to deliver this user's mail.
The aliases aren't required to exist as users on the local system. In
the above example, there doesn't need to be a @code{postmaster} entry in
the @code{operating-system}'s @code{user-accounts} in order to deliver
the @code{postmaster} mail to @code{bob} (which subsequently would
deliver mail to @code{bob@@example.com} and @code{bob@@example2.com}).
@node Messaging Services
@subsubsection Messaging Services