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{ config, lib, pkgs, ... }: with import <stockholm/lib>; let

  to = concatStringsSep "," [
    "lass@green.r"
  ];

  mails = import <secrets/mails.nix>;

in {
  environment.systemPackages = [ pkgs.review-mail-queue ];

  krebs.exim-smarthost = {
    enable = true;
    dkim = [
      { domain = "lassul.us"; }
    ];
    primary_hostname = "lassul.us";
    sender_domains = [
      "lassul.us"
    ];
    relay_from_hosts = map (host: host.nets.retiolum.ip6.addr) [
      config.krebs.hosts.blue
      config.krebs.hosts.coaxmetal
      config.krebs.hosts.green
      config.krebs.hosts.mors
      config.krebs.hosts.xerxes
    ];
    internet-aliases = map (from: { inherit from to; }) mails;
    system-aliases = [
      { from = "mailer-daemon"; to = "postmaster"; }
      { from = "postmaster"; to = "root"; }
      { from = "nobody"; to = "root"; }
      { from = "hostmaster"; to = "root"; }
      { from = "usenet"; to = "root"; }
      { from = "news"; to = "root"; }
      { from = "webmaster"; to = "root"; }
      { from = "www"; to = "root"; }
      { from = "ftp"; to = "root"; }
      { from = "abuse"; to = "root"; }
      { from = "noc"; to = "root"; }
      { from = "security"; to = "root"; }
      { from = "root"; to = "lass"; }
    ];
  };
  krebs.iptables.tables.filter.INPUT.rules = [
    { predicate = "-p tcp --dport smtp"; target = "ACCEPT"; }
  ];
}