Symfony 5邮件程序：无法在SMTP上进行身份验证

我正试图通过以下方式使用Symfony 5.2上的新邮件程序。 我做了一个像这样的邮件控制器：

/**
 * @var EntityManagerInterface
 */
private $entityManager;

/**
 * @var Swift_Mailer
 */
private $mailer;

/**
 * MailingController constructor.
 *
 * @param EntityManagerInterface $entityManager
 * @param Swift_Mailer $mailer
 */
public function __construct(EntityManagerInterface $entityManager,
                            Swift_Mailer $mailer)
{
    $this->mailer = $mailer;
    $this->entityManager = $entityManager;
}


/**
 * @Route("/email")
 * @param MailerInterface $mailer
 * @return Response
 * @throws \Symfony\Component\Mailer\Exception\TransportExceptionInterface
 */
public function sendEmail(MailerInterface $mailer): Response
{
    $email = (new Email())
        ->from('hello@example.com')
        ->to('hello@example.com')
        //->cc('cc@example.com')
        //->bcc('bcc@example.com')
        //->replyTo('fabien@example.com')
        //->priority(Email::PRIORITY_HIGH)
        ->subject('Time for Symfony Mailer!')
        ->text('Sending emails is fun again!')
        ->html('<p>See Twig integration for better HTML integration!</p>');

    $mailer->send($email);

    // ...
}

---

我被这个错误缠住了，我在网上到处都找过了，但是找不到任何可以消除这个错误的方法。

我确实发现了问题，我将.env.local中的配置更改为：

###> symfony/sendgrid-mailer ###
SENDGRID_KEY=KEY
MAILER_DSN=sendgrid+smtp://$SENDGRID_KEY@default
###< symfony/sendgrid-mailer ###

###>symfony/sendgrid邮件###
SENDGRID_KEY=KEY
MAILER_DSN=sendgrid+smtp://$sendgrid_KEY@default
###

---

它现在工作得很好。

感谢您的回答，但正如您所看到的，我没有使用swiftMailer依赖项，而是在函数sendEmail中使用MailerInterface。

Failed to authenticate on SMTP server with username "apikey" using the following authenticators: "LOGIN", "PLAIN". Authenticator "LOGIN" returned "Symfony\Component\Mailer\Exception\TransportException: Expected response code "235" but got code "451", with message "451 Authentication failed

###> symfony/sendgrid-mailer ###
SENDGRID_KEY=KEY
MAILER_DSN=sendgrid+smtp://$SENDGRID_KEY@default
###< symfony/sendgrid-mailer ###