通过邮件枪在laravel 5.4中发送带有附件的邮件

'default' => 'mailgun',

MAIL_DRIVER=mailgun
MAILGUN_DOMAIN=your-mailgun-domain
MAILGUN_SECRET=your-mailgun-api-key

php artisan make:mail AttachmentMail

use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;
use Illuminate\Contracts\Queue\ShouldQueue;

class AttachmentMail extends Mailable
{
    use Queueable, SerializesModels;

    protected $attachmentPath;

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

    public function build()
    {
        return $this->view('emails.attachment')
                    ->attach($this->attachmentPath);
    }
}

use App\Mail\AttachmentMail;
use Illuminate\Support\Facades\Mail;

public function sendAttachmentEmail()
{
    $attachmentPath = public_path('attachments/file.pdf');

    Mail::to('recipient@example.com')->send(new AttachmentMail($attachmentPath));

    return "Attachment email sent successfully!";
}