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{ config, lib, pkgs, ... }:
with lib;
{
###### interface
options = {
services.pfix-srsd = {
enable = mkOption {
default = false;
type = types.bool;
description = "Whether to run the postfix sender rewriting scheme daemon.";
};
domain = mkOption {
description = "The domain for which to enable srs";
type = types.str;
example = "example.com";
};
secretsFile = mkOption {
description = ''
The secret data used to encode the SRS address.
to generate, use a command like:
<literal>for n in $(seq 5); do dd if=/dev/urandom count=1 bs=1024 status=none | sha256sum | sed 's/ -$//' | sed 's/^/ /'; done</literal>
'';
type = types.path;
default = "/var/lib/pfix-srsd/secrets";
};
};
};
###### implementation
config = mkIf config.services.pfix-srsd.enable {
environment = {
systemPackages = [ pkgs.pfixtools ];
};
systemd.services."pfix-srsd" = {
description = "Postfix sender rewriting scheme daemon";
before = [ "postfix.service" ];
#note that we use requires rather than wants because postfix
#is unable to process (almost) all mail without srsd
requiredBy = [ "postfix.service" ];
serviceConfig = {
Type = "forking";
PIDFile = "/run/pfix-srsd.pid";
ExecStart = "${pkgs.pfixtools}/bin/pfix-srsd -p /run/pfix-srsd.pid -I ${config.services.pfix-srsd.domain} ${config.services.pfix-srsd.secretsFile}";
};
};
};
}
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