[SlugBug] postfix >> /dev/null/

[Bill Best]

how do.

i'm running postfix on a mailserver.

i want to cancel a user's account (user1) but i don't want to merely 
delete user1 because anything at domain.org.uk ends up in a catch-all 
account (yes, there are spam-related issues with this but our clientele 
are often challenged by spelling email addresses correctly).

my question is, how do i redirect all mail to this closed account to 
/dev/null ???

could i do it in /etc/aliases e.g.

user1:    /dev/null/

i could always STFW but it's been a bit quiet on here lately.

cheers in advance

bb