Reporting-MTA: dns; bittern.ukcod.org.uk Action: failed Final-Recipient: rfc822;xxxx@xxxxx.xx Status: 5.0.0 Remote-MTA: dns; d306035.a.ess.de.barracudanetworks.com Diagnostic-Code: smtp; 550 permanent failure for one or more recipients (xxxx@xxxxx.xx:550 Proxy timed out)