Re: [exim] unrouetable address

>
> /var/log/exim4/mainlog showing error unrouetable address .I
> am using debian 3.1 sarge . How can i rectify this problem
> any authentication problem.
>
That means Exim doesn't know how to route that address.
Try
exim -d -bt (address that is failing)
and see what it says.
John