AW: SENDERCHECK patch

>I've written a small patch that extends the SENDERCHECK facility. It allows
the definition of SENDERCHECK="AUTH", besides the already existent STRICT
and LOOSE.
>
>The behaviour of SENDERCHECK is the same, except that when set to "AUTH",
if the sender address is local, and is verified in LDAP, the server will
require that 
>the sender is authenticated.
>
>I have written this patch because of the increasing number of spambots
forging valid local addresses. Many times using the same sender as the
recipient.
>

Is it possible to activate this feature based on the SENDERDOMAIN ?
I have some Domains where a the local adresses are often forged but i also
have some where it's necessary 
to use the local address as sender .

Kind regards
Stefan