alevel_project/app/Mail/OfferRequestMail.php

<?php

namespace App\Mail;

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

class OfferRequestMail extends Mailable
{
    use Queueable, SerializesModels;

    protected $user;

    /**
     * Create a new message instance.
     *
     * @param User $user
     */
    public function __construct(User $user)
    {
        $this->user = $user;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        return $this->view('emails.offer_request')
            ->to($this->user)->subject('Запрос на обмен')
            ->with(['name'=>$this->user->nickname]);
    }
}