forward_route: debug_print = "R: forward_local for $local_part@$domain" driver = manualroute domains = +forward_domains local_part_prefix = real- local_parts = lsearch;/etc/exim4/forward-users transport = remote_smtp route_list = * forward.to.main.mx no_more Подробно можно прочитать тут http://www.exim.org/exim-html-current/doc/html/spec_html/ch20.html