--- qpsmtpd-forkserver.orig    2009-11-06 05:20:22.000000000 +1100
+++ qpsmtpd-forkserver 2012-04-23 09:56:55.000000000 +1000
@@ -244,8 +244,9 @@
     if (!$hisaddr) {
       # possible something condition...
       next;
     }
+    $client->sockopt(SO_KEEPALIVE,1);
     IO::Handle::blocking($client, 1);
     # get local/remote hostname, port and ip address
     my ($port, $iaddr, $lport, $laddr, $nto_iaddr, $nto_laddr) = Qpsmtpd::TcpServer::lrpip($server, $client, $hisaddr);