answer to myself :-) I finally decided to use a body_checks map
it works well as the message is always the same CYBERDROID Inc. Le 03/05/2013 11:01, Frank Bonnet a écrit :
Hello We are hardly spammed by numerous sources , the FIRST line of each email is like the following Return-Path: <corona...@google.com>The left part of the address is constantly changed but the right is always @google.comI would like to discard all that spam, help greatly appreciated Thanks by advance