为什么我的FedEx包裹送达时没有收到通知？

I'm using FedEx web services and jeremy-dunn/php-fedex-api-wrapper and attempting to have FedEx send me a plaintext email notification when a package has been delivered. I am using a third party for order fulfillment, and they have and use a different FedEx account that is not mine. (Maybe this is the problem?)

I can track the packages just fine, and when I attempt to subscribe to the delivery notification, the response from FedEx seems to indicate success. I am in testing mode. I'm NOT currently in production mode, in case that matters.

My request uses the following function:

function fedexWebServicesNotificationSubscription( $trackingNumber, $recipient, $sender )
{
    global $fedexApiMode;

    if( ! is_array( $recipient ) OR ! isset( $recipient['email_addr'] ) )
        return FALSE;

    if( ! is_array( $sender ) OR ! isset( $sender['email_addr'], $sender['name'] ) )
        return FALSE;

    $userCredential = new ComplexType\WebAuthenticationCredential();
    $userCredential->setKey(FEDEX_KEY)
        ->setPassword(FEDEX_PASSWORD);

    $webAuthenticationDetail = new ComplexType\WebAuthenticationDetail();
    $webAuthenticationDetail->setUserCredential($userCredential);

    $clientDetail = new ComplexType\ClientDetail();
    $clientDetail->setAccountNumber(FEDEX_ACCOUNT_NUMBER)
        ->setMeterNumber(FEDEX_METER_NUMBER);

    $version = new ComplexType\VersionId();
    $version->setMajor(5)
        ->setIntermediate(0)
        ->setMinor(0)
        ->setServiceId('trck');

    $localization  = new ComplexType\Localization();
    $localization->setLocaleCode("US")
        ->setLanguageCode("EN");

    $emailRecip = new ComplexType\EMailNotificationRecipient();
    $emailRecip->setEMailNotificationRecipientType(SimpleType\EMailNotificationRecipientType::_SHIPPER)
        ->setEMailAddress( $recipient['email_addr'] )
        ->setLocalization($localization)
        ->setFormat(SimpleType\EMailNotificationFormatType::_TEXT)
        ->setNotificationEventsRequested([
                SimpleType\EMailNotificationEventType::_ON_DELIVERY,
                SimpleType\EMailNotificationEventType::_ON_EXCEPTION,
                SimpleType\EMailNotificationEventType::_ON_SHIPMENT,
                SimpleType\EMailNotificationEventType::_ON_TENDER
            ]);

    $emailNotificationDetail = new ComplexType\EMailNotificationDetail();
    $emailNotificationDetail->setPersonalMessage('Shipment Status Notification')
        ->setRecipients([$emailRecip]);

    $request = new ComplexType\TrackNotificationRequest();
    $request->setWebAuthenticationDetail($webAuthenticationDetail)
        ->setClientDetail($clientDetail)
        ->setVersion($version)
        ->setTrackingNumber( $trackingNumber )
        ->setSenderEMailAddress( $sender['email_addr'] )
        ->setSenderContactName( $sender['name'] )
        ->setNotificationDetail($emailNotificationDetail);

    $trackServiceRequest = new TrackService\Request();
    if( $fedexApiMode == 'production' )
        $trackServiceRequest->getSoapClient()->__setLocation(TrackService\Request::PRODUCTION_URL);
    $response = $trackServiceRequest->getGetTrackNotificationReply($request, TRUE);

    return $response;
}

I use that function like this:

$trackingNumber = '781893213291';

$recipient = [
    'email_addr' => 'email@example.com'
];

$sender = [
    'email_addr' => 'email@example.com',
    'name'       => 'My Name'
];

$response = fedexWebServicesNotificationSubscription( $trackingNumber, $recipient, $sender );

echo '<pre>';
var_dump($response);
echo '</pre>';

And my response looks like this:

object(stdClass)#28 (6) {
  ["HighestSeverity"]=>
  string(7) "SUCCESS"
  ["Notifications"]=>
  object(stdClass)#29 (5) {
    ["Severity"]=>
    string(7) "SUCCESS"
    ["Source"]=>
    string(4) "trck"
    ["Code"]=>
    string(1) "0"
    ["Message"]=>
    string(35) "Request was successfully processed."
    ["LocalizedMessage"]=>
    string(35) "Request was successfully processed."
  }
  ["Version"]=>
  object(stdClass)#30 (4) {
    ["ServiceId"]=>
    string(4) "trck"
    ["Major"]=>
    int(5)
    ["Intermediate"]=>
    int(0)
    ["Minor"]=>
    int(0)
  }
  ["DuplicateWaybill"]=>
  bool(false)
  ["MoreDataAvailable"]=>
  bool(false)
  ["Packages"]=>
  object(stdClass)#31 (6) {
    ["TrackingNumber"]=>
    string(12) "781893213291"
    ["TrackingNumberUniqueIdentifiers"]=>
    string(23) "12018~781893213291~FDEG"
    ["CarrierCode"]=>
    string(4) "FDXG"
    ["ShipDate"]=>
    string(10) "2018-07-17"
    ["Destination"]=>
    object(stdClass)#32 (4) {
      ["City"]=>
      string(13) "SAN FRANCISCO"
      ["StateOrProvinceCode"]=>
      string(2) "CA"
      ["CountryCode"]=>
      string(2) "US"
      ["Residential"]=>
      bool(false)
    }
    ["RecipientDetails"]=>
    object(stdClass)#33 (1) {
      ["NotificationEventsAvailable"]=>
      array(6) {
        [0]=>
        string(11) "ON_DELIVERY"
        [1]=>
        string(12) "ON_EXCEPTION"
        [2]=>
        string(12) "ON_EXCEPTION"
        [3]=>
        string(12) "ON_EXCEPTION"
        [4]=>
        string(12) "ON_EXCEPTION"
        [5]=>
        string(12) "ON_EXCEPTION"
      }
    }
  }
}

So it appears that I have subscribed, and that I should receive an email notification when the package is delivered, but the email never arrives. So I need help to know what's wrong with my code, or what's wrong with what I'm doing. I believe I understand what I'm doing, but no success.

https://www.fedex.com/us/developer/WebHelp/ws/2014/dvg/WS_DVG_WebHelp/26_Shipment_Notification_in_the_Ship_Request.htm

Here it says you cannot receive an email in test enviro

1) In test mode, notifications are not sent. With the production key (production mode), notifications are sent. This is what I was expecting.

2) My code and the response I am getting back are fine.

3) Adding a track notification for a package that was not sent through my account works just fine. There is no restriction to adding track notifications, other than there may only be a total of 4.