Added error handling in Laravel Mail

RegistrationDetails.php

<?php

namespace App\Mail\API;

use App\Events\API\MessageSending;
use App\User;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;
use Illuminate\Contracts\Mail\Mailer as MailerContract;

class RegistrationDetails extends Mailable implements ShouldQueue
{
    use Queueable, SerializesModels;

    public $tries = 3, $file;
    /**
     * Create a new message instance.
     *
     * @return void
     */
    public function __construct($file)
    {
        $this->file = $file;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        return $this->markdown('emails.registration.invite')
            ->attach(\Storage::disk('users')->url($this->file));
    }


    /**
     * Override send function
     */
    public function send(MailerContract $mailer)
    {
        try {
            parent::send($mailer);
            User::where('qr_code', $this->file)->firstOrFail()->update(['mail_sent_at' => now()]);
            \Log::debug('email sent');
        } catch (\Exception $error) {
            \Log::debug($error->getMessage());
        }
    }
}