sendmail - blocking addresses

[Carlos Sousa <csousa@tvtel.pt>]

I'm using sendmail, and I want to block all mail from assh@clown.com. 
The reason I'm posting this to debian-users is that I would like to do 
it the debian way (sendmailconfig is a cool tool and a great 
timesaver), but I couldn't find any clues in my system or on the 
Internet (debian archives, etc.).

I can always do this by hand using sendmail.org's pointers, but my 
setup will probably be trashed next time the sendmail package is upgraded.

Thanks for any pointers on how to implement address blocking with the 
debian-provided package.

Carlos Sousa