Don't put the report in the 'Sent' folder

source/client/client.d

@@ -752,6 +752,5 @@ public final class ButterflyClient : Thread
 
             gprintln("Saved mail message to sent folder");
         }
-
     }
 }

source/client/sender.d

@@ -170,8 +170,8 @@ public final class MailSender : Thread
 
         gprintln(deliveryReport);
 
-        /* Deliver the error message */
-        client.sendMail(deliveryReport);
+        /* Deliver the error message (and don't put the report in the sent box) */
+        client.sendMail(deliveryReport, false);
 
         gprintln("Mail delivery report sent: " ~ deliveryReport.toPrettyString());