Can't edit yet, so will post below. As you can see in the sample, you can just copy/paste e-mails in there from bounce messages, just copy/paste the complete bounce mail in there, and it will extract the e-mail addresses from it.
This is sort of 0.99 beta, to test the functionality on a wider scale. For 7.3 the hack will be expanded by adding it to the menus of the control panel.