[Exim] Relay denied to local (virtual) addresses

Hi !!

Exim is refusing to deliver email to local accounts with this error:

failed to find host name from IP address

How can I configure exim so it does not this check when delivering to
local accounts ???

--
Thanx & best regards ...

Keyboard: Device used to enter errors into the computer.

----------------------------------------------------------------
     David Saez Padros                  e-mail  david@???
     On-Line Services 2000 S.L.         
     Trafalgar 78 2º 2ª B               voice   +34 93 315 15 93
     08010 Barcelona (Spain)            movil   +34 670 35 27 53      
     http://www.ols.es                  fax     +34 93 268 35 90
     http://www.ols.es/~david/   
----------------------------------------------------------------