Well, Zimbra uses amavisd-new to control scanning of messages for spam and viruses, so I think it really depends on the capabilities of amavisd-new. As far as I know, there isn't any way to control this from the admin console. I just did a quick search and found some recipient notification stuff, but it doesn't look like it applies to spam. I believe the thinking may be that receiving notifications for spam messages is almost as bad as getting the spam itself. |