zone "domain.com"
 type master;
 file "/path/to/zone/domain.com";
 notify yes; 
 };
                            
 //zone "mydomain.com" {
 //type master
 //file "/path/to/zone/mydomain.com";
 //notify yes
 //};
                             
 zone "do.com" {
 type master;
 file "/path/to/zone/do.com";
 notify yes;
 };