diff -urN qmail-1.03.orig/qmail-send.9 qmail-1.03.nodoublebounce/qmail-send.9
--- qmail-1.03.orig/qmail-send.9	Mon Jun 15 04:53:16 1998
+++ qmail-1.03.nodoublebounce/qmail-send.9	Tue Sep  9 12:59:04 2003
@@ -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.
diff -urN qmail-1.03.orig/qmail-send.c qmail-1.03.nodoublebounce/qmail-send.c
--- qmail-1.03.orig/qmail-send.c	Mon Jun 15 04:53:16 1998
+++ qmail-1.03.nodoublebounce/qmail-send.c	Tue Sep  9 13:02:43 2003
@@ -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)