Contact.php

<?php

namespace App\Mail;

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

class Contact extends Mailable
{
    use Queueable, SerializesModels;

    /**
     * @var \App\Message
     */
    protected $message = null;

    /**
     * Create a new message instance.
     *
     * @return void
     */
    public function __construct(Message $message)
    {
        $this->message = $message;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        return $this->markdown('emails.contact', $this->message->toArray());
    }
}