使用symfony/messenger时，切换symfony/mailer中的sendmail参数

// src/Message/EmailMessage.php
namespace App\Message;

class EmailMessage
{
    public $to;
    public $subject;
    public $body;

    public function __construct(string $to, string $subject, string $body)
    {
        $this->to = $to;
        $this->subject = $subject;
        $this->body = $body;
    }
}

// src/MessageHandler/EmailMessageHandler.php
namespace App\MessageHandler;

use App\Message\EmailMessage;
use Symfony\Component\Messenger\Handler\MessageHandlerInterface;
use Symfony\Component\Mailer\MailerInterface;
use Symfony\Component\Mime\Email;

class EmailMessageHandler implements MessageHandlerInterface
{
    private $mailer;

    public function __construct(MailerInterface $mailer)
    {
        $this->mailer = $mailer;
    }

    public function __invoke(EmailMessage $message)
    {
        $email = (new Email())
            ->to($message->to)
            ->subject($message->subject)
            ->text($message->body);

        $this->mailer->send($email);
    }
}

// 在控制器或其他地方发送消息
use Symfony\Component\Messenger\MessageBusInterface;
use App\Message\EmailMessage;

public function sendEmail(MessageBusInterface $messageBus)
{
    $message = new EmailMessage('recipient@example.com', 'Subject', 'Body');
    $messageBus->dispatch($message);
}