--- qmail-1.03.orig/qmail-send.9	
+++ qmail-1.03.orig/qmail-send.9	
@@ -115,6 +115,10 @@ 
 (If that bounces,
 .B qmail-send
 gives up.)
+As a special case, if the first line of
+.IR doublebounceto
+is blank (contains a single linefeed), qmail-send will not queue
+the double-bounce at all.
 .TP 5
 .I envnoathost
 Presumed domain name for addresses without @ signs.
--- qmail-1.03.orig/qmail-send.c	
+++ qmail-1.03.orig/qmail-send.c	
@@ -683,6 +683,8 @@ 
   }
  if (str_equal(sender.s,"#@[]"))
    log3("triple bounce: discarding ",fn2.s,"\n");
+ else if (!*sender.s && *doublebounceto.s == '@')
+   log3("double bounce: discarding ",fn2.s,"\n");
  else
   {
    if (qmail_open(&qqt) == -1)
--9jxsPFA5p3P2qPhR--