We have a 2000 Server which is configured for our internal dns server and has a zone of companyname.com. We have a handful of A records and our MX record for mail.companyname.com. We have know put in a corporate mailing list solution which runs at lists.companyname.com. Where do we need to put the A and MX records for this? Do we need to add a new zone or a new domain under the existing zone? Any help is greatly appreciated.