MX email forwarding with only one record

MX email forwarding with only one record

Im using  a .co.cc domain that i have linked through the name server method with 000webhost. but i can input the mx records in 2 places. in the .co.cc website on my domain setting, but i'm unable because by doing so the name server set-up would have to be removed. i can also do it through 000webhost's control panel but it only allows me to use 1 mx record not 2. i have 3 emails that need this service to work. 

Thanks