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netcup Documentation

Web Hosting

DNS Records

Learn which DNS records you should configure for your domains in reseller web hosting.

1. IP-Addresses

It is best to check directly with the domain which IP addresses are being used. The IP addresses are displayed in the administration panel at the bottom of the Dashboard next to the domain.

Highlighted IP addresses in the dashboard.

You can change the IPv6 address at any time:
 

  1. In the Administration Panel, go to the desired subscription and select the Hosting & DNS tab > Hosting.
  2. Under IP addresses, select the desired IPv6 address and confirm by clicking Save.
  3. Make sure that the IPv6 address is also correctly stored in the DNS records.

2. Example DNS Records

Note that the records will only work as intended if the default DNS settings are used and emails are sent exclusively via the product’s mail server. Emails sent via alternative methods such as the web server (e.g., phpmail or sendmail) or an external mail server are excluded and not valid.

Web Server

  1. Root domain points to the web hosting server IPv4:
    • Host: @
    • Type: A
    • Destination: 1.2.3.4
       
  2. Root domain points to the web hosting server IPv6:
    • Host: @
    • Type: AAAA
    • Destination: 2001:DB8::1

Mail Server

  1. Indicates how the mail server can be reached.:
    • Host: @
    • Type: MX(10)
    • Destination: mail.mydomain.de (mydomain.de is to be replaced)

       
  2. SPF (allows emails to be sent from the server specified in the A record and in the MX record, as well as from our mail relay. This makes it possible for third parties to recognize whether the email actually comes from the domain owner.):
    • Host: @
    • Type: TXT
    • Destination: v=spf1 mx a include:_spf.webhosting.systems ~all

       
  3. DKIM (adds a digital signature to ensure that emails have not been altered and come from the rightful sender.):
    • Host: key1._domainkey
    • Type: CNAME
    • Destination: key1._domainkey.webhosting.systems

       
  4. DKIM (adds a digital signature to ensure that emails have not been altered and come from the rightful sender.):
    • Host: key2._domainkey
    • Type: CNAME
    • Destination: key2._domainkey.webhosting.systems

Both DKIM records (key1 and key2) are required for complete security.

Web and Mail Server

  1. All subdomains not defined separately point to the web hosting server IPv4:
    • Host: *
    • Type: A
    • Destination: 1.2.3.4

       
  2. All subdomains not defined separately point to the web hosting server IPv6.
    • Host: *
    • Type: AAAA
    • Destination: 2001:DB8::1

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Last update: 17 March 2026

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