MG (mail group member) resource record
The mail group record (MG) lists members of a mail group:
{mail group name} {ttl} addr-class MG member name IN MG BloomAn example for setting up a mailing list is as follows:
Bind IN MINFO Bind-Request dave.mynet.COM. IN MG mark.mynet.COM. IN MG vicki.mynet.COM. IN MG naomi.mynet.COM. IN MG carol.mynet.COM. IN MG denis.mynet.COM.