The post in question is time stamped:

Yesterday, 04:40 PM

The e-mail notification to me is time stamped:

Date: April 8, 2006 7:59:51 PM GMT+07:00

Which is when it showed up in my inbox.

And, here is the raw source of the message:

Code:
Return-path: <[email protected]>
Received: from mac.com (smtpin18-en2 [10.13.11.246])
 by ms35.mac.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004))
 with ESMTP id <[email protected]> for [email protected]; Sat,
 08 Apr 2006 05:59:59 -0700 (PDT)
Received: from server159.serverscenter.com
 (www.serverscenter.com [207.150.190.18])
	by mac.com (Xserve/smtpin18/MantshX 4.0) with ESMTP id k38Cxsx7010967	for
 <[email protected]>; Sat, 08 Apr 2006 05:59:58 -0700 (PDT)
Received: from nobody by server159.serverscenter.com with local (Exim 4.52)
	id 1FSD2d-0006Z3-As	for [email protected]; Sat, 08 Apr 2006 08:59:51 -0400
Date: Sat, 08 Apr 2006 08:59:51 -0400
From: "TeakDoor.com - The Thailand Forum" <[email protected]>
Subject: Reply to post 'What Book Are You Reading?'
To: [email protected]