Using a Custom Domain for Sending Newsletters in the Email Marketing Tool

To send email newsletters with your own sender address, DNS adjustments to the desired sender domain are required. This article explains how to make them.


  • You have a domain with which you are able to manage its DNS records.

Connecting a Domain in Email Marketing

  • Log in to your IONOS account.
  • Click Menu > Online Marketing > Email Marketing > Open.
  • In the Your Account section of the overview page, select Change Domain. The Change sendout domain window opens.
  • Enter the subdomain and domain name and finish your entry with Change domain. The domain and subdomain will be checked automatically.
  • If your domain is already set up correctly and the process was successful, you will see the message "New domain is configured correctly and domain change is now in processing." You can now click Close.
  • Alternatively, if you are using an IONOS domain that can be set up automatically, click the To domain hoster IONOS... button to link the domain.

In certain other cases, you may need to encounter an error that your DNS records are not set up properly. If so, you will need to establish a manual domain connection by following the steps in the section below.

Once the DNS settings have been created, simply follow the steps above again to change your domain.

Manually Creating DNS Entries for Sending Newsletters

Please Note

In order to complete the steps below, you will need to create a subdomain to use for sending the newsletters. You can find out how to create a subdomain in this article.

If a domain cannot be connected automatically, change the DNS settings manually. Please note that the following instructions were created with IONOS as the provider. If you manage your DNS with another provider, please see their instructions for editing DNS records.

  • Log in to your IONOS account.
  • Click Menu > Domain & SSL in the title bar. An overview of your domains is displayed,
  • In the Actions column, click the gear icon and select DNS in the row of the domain you need to manage.
  • Click on the Add record button and select NS.
  • In the Hostname field, enter the subdomain you will use to send newsletters, such as The subdomain component, in this example "newsletter", can be anything you choose.
  • In the Points to field, enter the following value:
  • In the TTL field, keep the default value of 1 hour.
  • Save your entries. The DNS settings will open again.
  • Perform steps 4 through 8 of this guide a second time. However, for the Points to field, use the entry The other values remain the same.

Please Note

Due to the decentralized structure of the domain name system (DNS), it can take up to 48 hours before your entries can be used for sending newsletters.