How to hold a specific recipient

[(lists) Denis BUCHER]

Hello everyone,

I read a lot of emails on this ML and on the web without finding the 
solution, or I do something wrong.

I just want that all emails to a specific recipient are put on hold.

I thought this would work, but it doesn't :

 * main.cf :
     o smtpd_relay_restrictions = check_recipient_access
       hash:/etc/postfix/recipient_access permit_mynetworks
       permit_sasl_authenticated defer_unauth_destination
 * /etc/postfix/recipient_access :
     o em...@domain.ch        HOLD
 * postmap /etc/postfix/recipient_access

Thanks in advance a lot for any hint or help !

Denis