Right. I've reversed the order of the Received headers as each one is prepended. Let's take a look at the story of the slow mail message ;)
Received: from netgate.airways.co.nz (smtp.airways.co.nz [210.48.109.206]) by it.canterbury.ac.nz (PMDF V6.2-X27 #31339) with ESMTP id <[EMAIL PROTECTED]> for [EMAIL PROTECTED] (ORCPT [email protected]); Mon, 02 Apr 2007 16:06:20 +1200 (NEW ZEALAND STANDARD TIME) --- here the messaage is sent from airways.co.nz (the sender's mail system) to canterbury's MX server. --- nothing interesting here. Received: from PMAS-DAEMON.it.canterbury.ac.nz by it.canterbury.ac.nz (PMDF V6.2-X27 #31339) id <[EMAIL PROTECTED]> for [EMAIL PROTECTED] (ORCPT [email protected]); Mon, 02 Apr 2007 16:06:19 +1200 (NEW ZEALAND STANDARD TIME) --- amazingly, the message travels backwards in time by one second --- in reality, a clock difference between servers ;) --- all within Canterbury's mail system. Received: from CONVERSION-DAEMON.it.canterbury.ac.nz by it.canterbury.ac.nz (PMDF V6.2-X27 #31339) id <[EMAIL PROTECTED]> for [EMAIL PROTECTED] (ORCPT [email protected]); Mon, 02 Apr 2007 16:06:22 +1200 (NEW ZEALAND STANDARD TIME) --- a couple of seconds delay as it gets shunted around Canterbury's mail system. Received: from PROCESS-DAEMON.it.canterbury.ac.nz by it.canterbury.ac.nz (PMDF V6.2-X27 #31339) id <[EMAIL PROTECTED]> (original mail from [EMAIL PROTECTED]) for [EMAIL PROTECTED]; Mon, 02 Apr 2007 16:06:25 +1200 (NEW ZEALAND STANDARD TIME) --- a few more seconds delay (do they really need this many hops within their mail system!?) Received: from cantva.canterbury.ac.nz (cantva.canterbury.ac.nz [132.181.2.27]) by mx.node6503.gplhost.com (Postfix) with ESMTP id 5FF551005A89 for <[EMAIL PROTECTED]>; Mon, 2 Apr 2007 13:56:42 +0800 (SGT) --- a foreign server in a different timezone - the converted time is 17:56:42. --- there's your delay - gplhost.com did not receive this message untl 17:56:42 NZST. --- that means that cantva.canterbury.ac.nz didn't pass it on until then --- so the delay lies within Canterbury's mail system --OR-- gplhost.com was refusing mail up until then (e.g. greylisting). HTH -Jasper
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