Service plan preferences set in the service plan are defined by the preferences node. This node is specified by complex type DomainTemplatePreferencesType (domain_templates.xsd). It is structured as follows:

• The stat node is optional. It specifies the number of months for which the traffic statistics should be kept for a subscription. Data type: integer.
• The maillists node is optional. It enables or disables the use of mailing lists on a subscription created using this service plan. Data type: Boolean.
• The mailservice node is optional. It switches on or off the mail service on subscriptions created using this service plan. Data type: Boolean.
• The dns_zone_type node is optional. Specifies the type of DNS zone for a subscription created using this service plan. Data type: ZoneType (string). Allowed values: master | slave.