[qmailtoaster] Multiple IPs on one machine

[curt . qt]

On a qmailtoaster box hosting several email domains, is it possible to assign a
different IP address to one of the domains? I know how to set up multiple IP
address on the linux box, but I'm not sure how to (or even if it's possible) to
set up qmail to select the IP it sends from based on the sender's domain.