[exim] About the .forward file

Hi,

Back in the sendmail world, when I wannt get mails for idckid
forwarded to idckid@???, I simply do ``echo idckid@??? >
~/.forward''. And all mails to local user idckid would be forwarded
directly to idckid@???.
Now I am using exim4 on my system, doing exatly the same way wouldn't work.
So my question is that, how do I finish this task?
Thanks in advanced.

Idckid