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-rw-r--r--doc/guix.texi52
1 files changed, 40 insertions, 12 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index a482beea50..753c3998e5 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -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