2nd email server

My site somedomain.xyz is hosted in a virtualmin server with ns1.abc.com and ns2.abc.com. I have created another server with another ip which has ns1.111.xyz and ns2.111.xyz . Now i want to use the second server to use email for somedomain.xyz. Shall i only change the mx record of somedomain.xyz to abc.com? Will it work?
and how should i add the somedomain.xyz to my second virtualmin server only for e-mail? Shall i also add the domain somedomain.xyz to my second server though somedomain ns1 and ns2 is pointing to the first server abc.com then will i receive email? I am confused on what to do for the second server.

also tell this abc.com that mail server has gone there

Thanks it worked.