Send Broadcast Mailing to Different Audiences

Content

Hello,

We would like to be able to send a broadcast mailing to different audiences. At the moment we have to copy a previous mailing, add a different contact list and then send that new mailing copy. As you can imagine this is resulting in a lot of mailing copies.

Nothing about the mailing itself is actually changing except who it is being sent to. We aren't able to just change the list on an existing mailing and send it again as the audience options (add contact list, add segment) become greyed out once the mailing is sent. Is there a way to send the same mailing to different audiences or must a new mailing be created everytime?