try new mailboxcheck

zimbraAddressAvailable.php

@@ -12,11 +12,11 @@ require_once("api/Zm/Account.php");
 use Illuminate\Database\Capsule\Manager as Capsule;
 
 $whmcs = App::self();
-$productID = $_GET['pid'];
+$packageID = $_GET['pid'];
 $accessData = array('zimbraServer' => '', 'adminUser' => '', 'adminPass' => '');
 $serverIDObj = Capsule::table('tblhosting')
 	->select('server')
-	->where('id', '=', $productID)
+	->where('packageid', '=', $packageID)
 	->get();
 $serverID = $serverIDObj[0]->server;
 $server = Capsule::table('tblservers')