SM 100.x now gives us the ability to choose which domains to send mass mailing to as SysAdmin.

We white label our services, including email, for one of our customers. It would be a great boon if domains were able to be organized as named groups so that these can be sent mail as a group. In addition, if separate footers could be produced in mass mailing for those groups and generally provide ways to distinguish these groups it might be possible to extend this beyond mass mailing.