pixelfed/app/Mail/ContactAdmin.php

<?php

namespace App\Mail;

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

class ContactAdmin extends Mailable
{
    use Queueable, SerializesModels;

    protected $contact;

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

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