ProvidersDictionary = function() {
  var start = new Date().getTime();
  this.providers = fs.readFileSync(process.env.PWD + "/server/dictionaries/list.txt").toString().split("n");
  this.lookUp = function(domain) {
    return (this.providers.indexOf(domain) !== -1)? true : false;
  }
}

Meteor.methods({'isAFreeProviderEmailDomain' : function(domain) {
    var freeProviders = new ProvidersDictionary();
    var res = freeProviders.lookUp(domain);
    return res;
  }
});

var evalDomain = function() {
  var userDomain = getUserDomain(Meteor.userId());
  var res Meteor.call('isAFreeProviderEmailDomain', userDomain);
  return res;
}

Template.userRegistrationForm.helpers({
  'isAFreeEmailProvider' : function() {
    var res = evalDomain();
    return res;
  }
});