If you set the From field for a Hudson installation to some generic address -
hudson@whatever.com - but send To a real alias - my-project-croaked@whatever.com

• then Reply will send back to hudson@whatever.com and Reply All will send to
  both addresses. Probably you would want to send

From: hudson@whatever.com
To: my-project-croaked@whatever.com
Reply-To: my-project-croaked@whatever.com

to make it easier for developers to respond to the message.