> Is there any switch available which makes httrack to 
detect 
> redirections and exclude pages for which the request has 
> been redirected.

httrack will always detect redirections - BUT will only 
follow then if the scan rules allows that.

Example: if the redirects points to a lower subtree, 
httrack will generally follow it. But it won't be the case 
*by default* for higher structures or different host 
address.