[Exim] Unrouteable address because of aliases

Hi people!


i've just installed exim-4.10 on my system. i had had severel problems
with it but i could solved them ( finding the answers during reading the
maillist )
but there is still an error. i couldn't find the answer.

in /etc/aliases i put this line :

webmaster: gtnet

i tried to send a letter to my box (from my box) to webmaster@
(which is a non-existing user). but i got this error in exim's log:

(of course i replaced the hostname with xxxxxxxxxxxx )

Nov 29 23:24:09 hok exim[28703]: 2002-11-29 23:24:09 18HtYO-0007Sx-00 <=
gtnet@xxxxxxxxx U=gtnet P=local-esmtp S=466
id=Pine.LNX.4.44.0211292324070.28702-100000@xxxxxxxxxxxxxxx
Nov 29 23:24:09 hok exim[28704]: 2002-11-29 23:24:09 18HtYO-0007Sx-00 **
webmaster@xxxxxxxxxxxxxx: Unrouteable address
Nov 29 23:24:09 hok exim[28705]: 2002-11-29 23:24:09 18HtYP-0007Sz-00 <=
<> R=18HtYO-0007Sx-00 U=mail P=local S=1299
Nov 29 23:24:09 hok exim[28704]: 2002-11-29 23:24:09 18HtYO-0007Sx-00
Completed
Nov 29 23:24:09 hok exim[28706]: 2002-11-29 23:24:09 18HtYP-0007Sz-00 =>
gtnet <gtnet@xxxxxxxxxxxxxxx> R=localuser T=local_delivery
Nov 29 23:24:09 hok exim[28706]: 2002-11-29 23:24:09 18HtYP-0007Sz-00
Completed


---
in my exim.conf system_aliases settings are these (i user the default
settings)

system_aliases:
driver = redirect
allow_fail
allow_defer
data = ${lookup{$local_part}lsearch{/etc/aliases}}
# user = exim
file_transport = address_file
pipe_transport = address_pipe
---


please help me.
thanks in advance!

greets

GTnet