Pigeonhole vacation from alias address

Hi everyone.

I've set up my instance not to check recipient address with sieve_vacation_dont_check_recipient=yes to enable users to set up their vacation script without listing addresses (there are to many). Only problem remaining is that when they receive an e-mail sent to their alias, the vacation response comes from their original mail address.

Is there a setting or workaround that would enable vacation extension to send response with from field set to whichever address the original message was addressed to.

Thank you in advance, Dino P. S. This is my first message to the list so I apologize in advance if I have broken any rules. It was not done intentionally