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nixos: add 'localRecipients' config option for Postfix

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The new option services.postfix.localRecipients allows
configuring the postfix option 'local_recipient_maps'. When
set to a list of user names (or patterns), that map
effectively replaces the lookup in the system's user
database that's used by default to determine which local
users are valid.

This option is useful to explicitly set local users that are
allowed to receive e-mail from the outside world. For local
injection i.e. via the 'sendmail' command this option has no
effect.
This commit is contained in:
Peter Simons 2019-07-15 13:52:26 +02:00
parent b43744b933
commit 59bacaca3d
1 changed files with 19 additions and 0 deletions
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19
nixos/modules/services/mail/postfix.nix
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@ -13,6 +13,7 @@ let
|| cfg.extraAliases != "";
haveTransport = cfg.transport != "";
haveVirtual = cfg.virtual != "";
haveLocalRecipients = cfg.localRecipients != null;
clientAccess =
optional (cfg.dnsBlacklistOverrides != "")
@ -244,6 +245,7 @@ let
aliasesFile = pkgs.writeText "postfix-aliases" aliases;
virtualFile = pkgs.writeText "postfix-virtual" cfg.virtual;
localRecipientMapFile = pkgs.writeText "postfix-local-recipient-map" (concatMapStrings (x: x + " ACCEPT\n") cfg.localRecipients);
checkClientAccessFile = pkgs.writeText "postfix-check-client-access" cfg.dnsBlacklistOverrides;
mainCfFile = pkgs.writeText "postfix-main.cf" mainCf;
masterCfFile = pkgs.writeText "postfix-master.cf" masterCfContent;
@ -506,6 +508,19 @@ in
'';
};
localRecipients = mkOption {
type = with types; nullOr (listOf string);
default = null;
description = ''
List of accepted local users. Specify a bare username, an
<literal>"@domain.tld"</literal> wild-card, or a complete
<literal>"user@domain.tld"</literal> address. If set, these names end
up in the local recipient map -- see the local(8) man-page -- and
effectively replace the system user database lookup that's otherwise
used by default.
'';
};
transport = mkOption {
default = "";
description = "
@ -742,6 +757,7 @@ in
// optionalAttrs haveAliases { alias_maps = [ "${cfg.aliasMapType}:/etc/postfix/aliases" ]; }
// optionalAttrs haveTransport { transport_maps = [ "hash:/etc/postfix/transport" ]; }
// optionalAttrs haveVirtual { virtual_alias_maps = [ "${cfg.virtualMapType}:/etc/postfix/virtual" ]; }
// optionalAttrs haveLocalRecipients { local_recipient_maps = [ "hash:/etc/postfix/local_recipients" ] ++ optional haveAliases "$alias_maps"; }
// optionalAttrs (cfg.dnsBlacklists != []) { smtpd_client_restrictions = clientRestrictions; }
// optionalAttrs cfg.useSrs {
sender_canonical_maps = [ "tcp:127.0.0.1:10001" ];
@ -869,6 +885,9 @@ in
(mkIf haveVirtual {
services.postfix.mapFiles."virtual" = virtualFile;
})
(mkIf haveLocalRecipients {
services.postfix.mapFiles."local_recipients" = localRecipientMapFile;
})
(mkIf cfg.enableHeaderChecks {
services.postfix.mapFiles."header_checks" = headerChecksFile;
})