Recipient address rewrite at delivery , after content filter

[Ovidiu Bivolaru]

Hello everyone,

I've Postfix setup as a gateway machine (using content_filter, 
relay_domains and transport_maps). I would like to receive messages for 
"domain.com", process them with content filter using recipients 
@domain.com, then at delivery time convert recipient addresses to 
g.domain.com and deliver them to smarthost using either relay_host, 
either transport_maps.
I was trying to use virtual_alias_maps (@domain   @g.domain.com), but 
recipients address is converted before content_filter (-o 
receive_override_options=no_address_mappings for 10026).  Can you help 
me with suggestion on how to convert envelope recipient address from 
u...@domain.com to u...@g.domain.com at delivery time (after 
content_filter) ? Thank you!

Regards,
Ovidiu