Nova indexQuery in relationships of relationship

I've 3 models

User has a hasmany relation (domains()) with Domain and this hasMany relation (mailboxes) with Mailbox

User.php

public function domains()
{
    return $this->hasMany(Domain::class);
}

Domain.php

public function user()
{
    return $this->belongsTo(User::class);
}

public function mailboxes()
{
    return $this->hasMany(Mailbox::class, 'domain', 'domain');
}

Mailbox.php

public function domains()
{
    return $this->belongsTo('App\Domain', 'domain', 'domain');
}

Code below work fine for get only mailboxes owned but if put in policies not work.

public function view(User $user, Mailbox $mailbox)
{
    $domains = Domain::where('user_id', $user->id)->pluck('domain')->toArray();

    return User::with([
        'domains.mailboxes' => function ($builder) use ($domains) {
            $builder->where('domain',$domains);
        }
    ])->find($user);

}

I tried overrinding indexQuery on my Nova/Mailbox model, but not work. Retunr all mailboxes on database

public static function indexQuery(NovaRequest $request, $query)
{

    $domains = Domain::where('user_id', $request->user()->id)->pluck('domain')->toArray();

    return User::with([
        'domains.mailboxes' => function ($builder) use ($domains) {
            $builder->where('domain',$domains);
        }
    ])->find($user);

    if ($request->user()->is_super_admin) {
        return $query;
    } else {
        return User::with([
            'domains.mailboxes' => function ($builder) use ($domains) {
                $builder->where('domain',$domains);
            }
        ])->find($user);
    }
}

On tinker (thanks to @tykus on post https://laracasts.com/discuss/channels/eloquent/understanding-eager-loading-with-lineal-relationship) workfine, but on Nova, user see all mailbox.

Also if activate MailboxesPolicy in AuthServiceProvider, user only index all mailboxes, but can not edit or delete.