反弹& lt; nobody@gmail.com>Gmail API发送失败

我正试图用谷歌API发送电子邮件。我能够阅读电子邮件，根据快速入门说明使用client_secret.json文件进行宣誓认证。我几乎有发送电子邮件工作，但不能发送成功。

我的电子邮件弹跳，我无法指定我要发送的电子邮件(因此nobody@gmail.com地址)。

代码:

<?php
require 'google-api-php-client/src/Google/autoload.php';
define('APPLICATION_NAME', 'Gmail API Quickstart');
define('CREDENTIALS_PATH', '~/.credentials/gmail-api-quickstart.json');
define('CLIENT_SECRET_PATH', 'client_secret.json');
define('SCOPES', implode(' ', array(
  Google_Service_Gmail::MAIL_GOOGLE_COM,
  Google_Service_Gmail::GMAIL_COMPOSE)
));
/**
 * Returns an authorized API client.
 * @return Google_Client the authorized client object
 */
function getClient() {
  $client = new Google_Client();
  $client->setApplicationName(APPLICATION_NAME);
  $client->setScopes(SCOPES);
  $client->setAuthConfigFile(CLIENT_SECRET_PATH);
  $client->setAccessType('offline');
  // Load previously authorized credentials from a file.
  $credentialsPath = expandHomeDirectory(CREDENTIALS_PATH);
  if (file_exists($credentialsPath)) {
    $accessToken = file_get_contents($credentialsPath);
  } else {
    // Request authorization from the user.
    $authUrl = $client->createAuthUrl();
    printf("Open the following link in your browser:'n%s'n", $authUrl);
    print 'Enter verification code: ';
    $authCode = trim(fgets(STDIN));
    // Exchange authorization code for an access token.
    $accessToken = $client->authenticate($authCode);
    // Store the credentials to disk.
    if(!file_exists(dirname($credentialsPath))) {
      mkdir(dirname($credentialsPath), 0700, true);
    }
    file_put_contents($credentialsPath, $accessToken);
    printf("Credentials saved to %s'n", $credentialsPath);
  }
  $client->setAccessToken($accessToken);
  // Refresh the token if it's expired.
  if ($client->isAccessTokenExpired()) {
    $client->refreshToken($client->getRefreshToken());
    file_put_contents($credentialsPath, $client->getAccessToken());
  }
  return $client;
}
/**
 * Expands the home directory alias '~' to the full path.
 * @param string $path the path to expand.
 * @return string the expanded path.
 */
function expandHomeDirectory($path) {
  $homeDirectory = getenv('HOME');
  if (empty($homeDirectory)) {
    $homeDirectory = getenv("HOMEDRIVE") . getenv("HOMEPATH");
  }
  return str_replace('~', realpath($homeDirectory), $path);
}
// Get the API client and construct the service object.
$client = getClient();
$service = new Google_Service_Gmail($client);

$msg = new Google_Service_Gmail_Message(); 
$mime = rtrim(strtr(base64_encode("TEST MESSAGE OR SOMETHING"), '+/', '-_'), '=');
$msg->setRaw($mime); 
// Print the labels in the user's account.
$userId = 'me';
function sendMessage($service, $userId, $message) {
  try {
    $message = $service->users_messages->send($userId, $message);
    print 'Message with ID: ' . $message->getId() . ' sent.';
    // <----------- GET'S HERE AND THIS WORKS
    return $message;
  } catch (Exception $e) {
    print 'An error occurred: ' . $e->getMessage();
  }
}
try {
    sendMessage($service, $userId, $msg); 
} catch (Exception $Ex ) {
    echo $Ex->getMessage(); 
}

An error occurred. Your message was not sent.
TEST MESSAGE OR SOMETHING Date: Tue, 21 Jul 2015 14:51:12 -0700 Message-Id: <