[Exim] Forwarding to another port on the same machine?

I'm trying to set up exim to listen on port 25, and deliver queued mail to port 26 on the same machine. exim accepts and queues the mail, but when it tries to deliver mail to an external domain, rather than forwarding it to port 26, it tries to connect to the external mailserver on 26 (and fails). I've set it up to listen on 25, send on 26, and accept no local mail. Here are my routers:

lookuphost:
driver = lookuphost
transport = remote_smtp
ignore_target_hosts = 127.0.0.1/8
no_more
self = pass

smart_host:
driver = domainlist
transport = remote_smtp
route_list = * my.mail.server byname
self = send


What am I doing wrong?

--
Kris Pearson
troll@???