NixOS-Config/nixos/server/package-configs/mail-server/configuration.nix

{
  inputs,
  outputs,
  lib,
  config,
  pkgs,
  ...
}: {
  imports = [
    (builtins.fetchTarball {
      # Pick a release version you are interested in and set its hash, e.g.
      url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/24128c3052090311688b09a400aa408ba61c6ee5/nixos-mailserver-A-COMMIT-ID.tar.gz";
      # To get the sha256 of the nixos-mailserver tarball, we can use the nix-prefetch-url command:
      # release="nixos-23.05"; nix-prefetch-url "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/24128c3052090311688b09a400aa408ba61c6ee5/nixos-mailserver-A-COMMIT-ID.tar.gz" --unpack
      sha256 = "1ngil2shzkf61qxiqw11awyl81cr7ks2kv3r3k243zz7v2xakm5c";
    })
  ];

  sops.secrets."mailpass".mode = "0440";
  sops.secrets."mailpass".owner = config.users.users.virtualMail.name;

  # users.users = {
  #   virtualMail = {
  #     isSystemUser = true;
  #     isNormalUser = false;
  #     group = "virtualMail";
  #   };
  # };

  mailserver = {
    enable = true;
    enableImap = true;
    enableSubmission = true;
    fqdn = "mail.gladtherescake.eu";
    domains = [
      "nextcloud.gladtherescake.eu"
      "akkoma.gladtherescake.eu"
      "social.gladtherescake.eu"
      "lillianviolet.dev"
      "git.lillianviolet.dev"
    ];

    loginAccounts = {
      "no-reply@nextcloud.gladtherescake.eu" = {
        hashedPasswordFile = config.sops.secrets."mailpass".path;
      };
      "no-reply@akkoma.gladtherescake.eu" = {
        hashedPasswordFile = config.sops.secrets."mailpass".path;
      };
      "no-reply@social.gladtherescake.eu" = {
        hashedPasswordFile = config.sops.secrets."mailpass".path;
      };
      "info@lillianviolet.dev" = {
        hashedPasswordFile = config.sops.secrets."mailpass".path;
        aliases = [
          "@lillianviolet.dev"
        ];
        catchAll = [
          "lillianviolet.dev"
        ];
      };
      "no-reply@git.lillianviolet.dev" = {
        hashedPasswordFile = config.sops.secrets."mailpass".path;
      };
    };

    mailboxes = {
      All = {
        auto = "subscribe";
        specialUse = "All";
      };
      Archive = {
        auto = "subscribe";
        specialUse = "Archive";
      };
      Drafts = {
        auto = "subscribe";
        specialUse = "Drafts";
      };
      Junk = {
        auto = "subscribe";
        specialUse = "Junk";
      };
      Sent = {
        auto = "subscribe";
        specialUse = "Sent";
      };
      Trash = {
        auto = "no";
        specialUse = "Trash";
      };
    };

    rejectRecipients = [
      "no-reply@nextcloud.gladtherescake.eu"
      "no-reply@akkoma.gladtherescake.eu"
      "no-reply@social.gladtherescake.eu"
      "no-reply@git.lillianviolet.dev"
    ];
    certificateScheme = "acme-nginx";
    certificateDomains = [
      "imap.lillianviolet.dev"
      "mail.lillianviolet.dev"
      "pop3.lillianviolet.dev"
      "lillianviolet.dev"
    ];
  };
}