If you get an error like "Fehler: DNS-Eintrag konnte nicht angelegt werden" when creating a TXT-Record in DNS-Administration of EUserv Customer Panel and you entered your domain or rather an @ for subdomains in the box „aufzulösender Wert (Hostname, z.B. "www")“ your entry will possibly not be accepted. In this case we recommend you to leave the field empty, because for Euserv Nameserver an input is not mandatory.