---
title: How to configure the reverse DNS of a failover IP on Dedibox
description: This page explains how to configure the reverse DNS of a failover IP on Scaleway Dedibox
tags: dedibox failover ip flexible-ip failover-ip
dates:
  validation: 2025-11-05
  posted: 2022-04-13
---
import DediboxScalewayMigration from '@macros/bare-metal/dedibox-scaleway-migration.mdx'
import Requirements from '@macros/iam/requirements.mdx'


<DediboxScalewayMigration />

You can configure the reverse DNS (rDNS) of a failover IP address with a custom value. This is particularly useful when sending emails from your Dedibox, as some remote mail servers may reject messages originating from generic reverse hostnames.

<Requirements />

- A Dedibox account logged into the [console](https://console.online.net)
- [Owner](/iam/concepts/#owner) status or [IAM permissions](/iam/concepts/#permission) allowing you to perform actions in the intended Organization
- Ordered a [Dedibox server](/dedibox-scaleway/how-to/order-dedibox/) and a [failover IP](/dedibox-scaleway/how-to/order-failover-ip/)

1. Click **Dedibox** in the **Bare Metal** section of the side menu.
2. Click the **Failover IPs** tab to display a list of your failover IPs.
3. Click <Icon name="more" /> next to the failover IP you want to edit. A drop-down menu displays.
4. Click **Edit reverse**. A pop-up displays.

    <Message type="tip">
      You can click <Icon name="more" /> next to the IP you want to configure in the listing of the failover IPs on the left.
    </Message>
5. Enter a new IPv4 reverse DNS and click **Save changes**.
    <Message type="important">
      Make sure that a valid and corresponding A-Record is set for the reverse DNS you want to configure.
    </Message>

The reverse DNS (PTR-Record) of the failover IP is being updated.