[Mimedefang] action_tempfail and delete_recipient question

[Xiaoyan Ma]

Have been running MD using example filter for awhile.  First time trying to 
add some code.  I would like to move David's greylist code from 
filter_recipient to filter_begin.  Searched list archive, read and reread 
man page.  This is what I came up with:

sub filter_begin () {
     my $sender = canonicalize_email ($Sender);
     my $ip =  $RelayAddr;

     foreach $recip (@Recipients) {
           if (should_greylist($sender, $recip)) {
           md_syslog('warning', "Filter Recipient:$sender:$recip");
                  #delete_recipient($recip);
                  return action_tempfail("Tempfailed as anti-spam 
measure.  Please try again.");
                  delete_recipient($recip);
           }
     }

.....


It works when there is one recipient and broke when there are more -- 
tempfailed all recipients.  I have 2 questions:

1. Does action_tempfail affects all recipients?

2. Is delete_recipient needed? If not, wouldn't tempfailed recipient 
receive a copy of the message?

or maybe my logic does not flow at all ?

Thanks.
Xiaoyan