NixOS-Config/nixos/queen/webmail.nix

{
  config,
  pkgs,
  lib,
  ...
}: {
  services.roundcube = {
    enable = true;
    # this is the url of the vhost, not necessarily the same as the fqdn of
    # the mailserver
    hostName = "webmail.lillianviolet.dev";
    extraConfig = ''
      # starttls needed for authentication, so the fqdn required to match
      # the certificate
      $config['smtp_server'] = "tls://${config.mailserver.fqdn}";
      $config['smtp_user'] = "%u";
      $config['smtp_pass'] = "%p";
    '';
  };
}