X-EnvelopeTo and forwarding

[Tristan Graham]

Hi,

I am having some problems sorting out forwarding for virtual domains - What 
is the correct way to set this up ? I have tried using fastforward, but 
this rewrites the X-EnvelopeTo field to the 'real' recipients address which 
obviously has certain effects that are undesireable. The envelope needs to 
remain as the original to address...

Is there a way to implement this easily ?

Many Thanks,

Tristan Graham