Help with exim4

I'm getting tired... I am trying to cinfugre exim just to receive emails, using this guide:

http://www.tq01.com/configuring-exim-with-virtual-users-on-debian

but all I get on the log is:

2014-02-08 18:07:41 H=mail-we0-f175.google.com [74.125.82.175] F= rejected RCPT : Unrouteable address

any help?