nixos/modules/services/mail/postfix.nix

   1 { pkgs, lib, config, ... }:
   2 let inherit (lib) types;
   3     inherit (config) networking;
   4     inherit (config.services) postfix;
   5 in
   6 {
   7 options.services.postfix.aliases = lib.mkOption {
   8   type    = with types; attrsOf (listOf str);
   9   default = {};
  10   example = { "root@${networking.domain}" = [
  11                 "user1@${networking.domain}"
  12                 "user2@${networking.domain}"
  13               ];
  14               "@example.coop" = ["user1@${networking.domain}"];
  15             };
  16 };
  17 }