Forwarded bounce messages coming from

[David Jonas]

When a bounce message from <> is going to an address that is in 
virtual_alias_maps the sender gets rewritten to <MAILER-DAEMON>, or at 
least that is what seems to happen. Some mail servers reject 
MAILER-DAEMON as a sender due to the lack of domain (att.net, 
comcast.net). How can I control this? What is the proper thing to do in 
this case?

I can't seem to figure this out. I tried setting empty_address_recipient 
= mailer-dae...@$myhostname, but that had no noticeable effect.

Thanks,

David