MG--Mail Group Member

{mail group name}  {ttl}    addr-class  MG  member name 
                            IN          MG  Bloom

The Mail Group record, MG, lists members of a mail group. Here is an example for setting up a mailing list:

Bind  IN  MINFO    Bind-Request        kjd.Berkeley.EDU.
      IN  MG       Ralph.Berkeley.EDU.
      IN  MG       Zhou.Berkeley.EDU.