domain mapping with enom easy email setup

hi there.... considering using enom for reseller so domains dont need to be pointed to nameservers manually. so is enom configured for auto dns? n if hosting server is changed do domains auto populate the new nameservers too?? also how does a web customer create a new email or forwarder... since usually this is done manually by me in cpanel?? wat else should i know b4 paying for an enom account? thnx.