[horde] Default domain when users aren't local

[Elliot Anders]

Hi all,
I'm about to deploy Webmail 1.1, but have one annoying bug which  
manifests in multiple applications.

Is there any way to setup default email addresses for internal  
notifications?   Both Kronolith and Ingo seem to want to use the  
username when sending messages via the notification system or when  
setting up a vacation message.

There is a place to set these per user for each application, but I'd  
like to default to sane addresses.  Currently when I setup a vacation  
message it is set to ignore messages from username not username at domain.com 
   and same for notifications.  This means I have all sorts of errors  
on delivery because username at localhost doesn't exist.

Thanks,
-Elliot