outgoing and incoming mail problems on exim

[Hoeteck Wee <hede@theunixplace.com>]

Hi,

Exim is failing to deliver outgoing mail and to accept incoming mail for
me:

1. outgoing mail: 'exim -d2 -bt foo@yahoo.com' gives
foo@yahoo.com is undeliverable:
  unrouteable mail domain "yahoo.com"

with -b11, it says:

routing foo@yahoo.com, domain yahoo.com
end of routers reached
foo@yahoo.com is undeliverable:
  unrouteable mail domain "yahoo.com"

2. for incoming local mail: 'exim -d2 -bt localuser' gives:
  unknown local-part "localuser" in domain <mydomain>

but i have localuser: foo@yahoo.com in /etc/email-addresses

A little more information on exim: I'm running 3.22-4
from woody, and /etc/exim/exim.conf is empty.

Thanks in advance!

-hoeteck