by rob » Thu Jan 08, 2009 10:57 am
When you say domain, do you actually mean email account (sorry but your terminology does seem a little confusing). However, the best way generally is purely through content filtering, as this can react to subjects and redirect mail to any account on any domain, even any folder within a given account. Basically you would use the actions "Place in Account Directory" and "Redirect To". I should note that the number of custom filters can be set to higher value via the group settings.