Setting Reverse Mapping for Server IP

For 1&1 IONOS Linux and Windows servers with a fixed IP address

To customize the reverse mapping for the IP address of your 1&1 IONOS Linux or Windows server.

A correctly set reverse mapping is particularly important for reliable operation of your own mail server.

Please note: Since no fixed IP addresses are assigned for Web Hosting packages and managed servers, this guide is not applicable for these product groups.

Step 1

Log in to 1&1 IONOS.

Step 2

On the 1&1 IONOS home page, select Server Administration > IP Addresses.

Step 3

Select the IP address for which you want to set the reverse entry and then click Reverse Mapping.

Step 4

Enter the domain for which the entry is to be set in the Reverse Mapping field and click OK.

Please note: It may take up to 72 hours before the settings are visible on the World Wide Web. For more information, see the DNS Change Duration article.