To use other external name servers in addition to DNS Made Easy name servers configuration of an Access Control List (ACL) is required. In the ACL you must specify the AXFR IP addresses of the external name servers that you will use for zone transfer. The external name servers must support AXFR. You then apply your ACL to your domains to begin zone transfers.
The AXFR name server you use for transfer is located under the “AXFR Server (used for zone transfers and NOTIFY)” section of the name server listing.