CentOS - Aug 2008 - Sendmail is not putting the full information in the received header anymore

Previously, when our server received an email it would slap the rcpt to in the
received headers by adding a for <...> any ideas what has changed?

Any pointers would be grateful.


Headers received today:

Return-Path: <xxxxxxxxxxxxxxxxxxx at xxxxxxxxxxxxxxxx>
Received: from psmtp.com (exprod8mx220.postini.com [64.18.3.120])
	by mail.pdinc.us (8.12.11.20060308/8.12.11) with SMTP id m7CCwh6o006066;
	Tue, 12 Aug 2008 08:58:44 -0400
Received: from source ([198.185.182.20]) (using TLSv1) by
exprod8mx220.postini.com ([64.18.7.10]) with SMTP;
	Tue, 12 Aug 2008 05:58:42 PDT
Received: from hq-exout01.anteon.com ([10.170.1.216])
  by hq-ipt01.anteon.com with ESMTP; 12 Aug 2008 08:58:16 -0400
X-SENDER-IP: 10.170.1.216
X-SENDER-REPUTATION: None
X-IronPort-AV: i="4.32,195,1217822400"; 
  
d="pdf'?doc'32?xls'32,32?zip'32,32,48?scan'32,32,48,208,217,32,48";
a="236730957:sNHT2674851018"
Received: from HQ-EXVS05.anteon.com ([10.170.1.146]) by HQ-EXOUT01.anteon.com
with Microsoft SMTPSVC(6.0.3790.3959);
	 Tue, 12 Aug 2008 08:58:16 -0400
x-mimeole: Produced By Microsoft Exchange V6.5
Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: multipart/mixed;
	boundary="----_=_NextPart_001_01C8FC7B.15CE4044"
Subject: SEAPORT E, RFP, Calibration Standards Management Support , Navy-FISC,
Corona, CA, New - Incumbent Known, Due Date: 8/22/2008 6:00:00 PM,
N00024-08-R-3381
Date: Tue, 12 Aug 2008 08:58:14 -0400
Message-ID: <2CFD33B485D9DE4E9DD95727F68FBBA85DD2C1 at
HQ-EXVS05.anteon.com>
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator: 
Thread-Topic: SEAPORT E, RFP, Calibration Standards Management Support ,
Navy-FISC, Corona, CA, New - Incumbent Known, Due Date: 8/22/2008 6:00:00 PM,
N00024-08-R-3381
Thread-Index: Acj8exTmRKNp5IQVQnS543hWImbznw=From: "Hopwood, Geoff"
<xxxxxxxxxxxxxxxxxxx at xxxxxxxxxxxxxxxx>
Bcc:
X-OriginalArrivalTime: 12 Aug 2008 12:58:16.0577 (UTC)
FILETIME=[1652EF10:01C8FC7B]
X-pstn-neptune: 1/1/1.00/92
X-pstn-levels:     (S:99.90000/99.90000 CV: 0.0940 P:95.9108 )
X-pstn-settings: 1 (0.1500:0.1500) CV gt3 gt2 gt1 p 
X-pstn-addresses: from <xxxxxxxxxxxxxxxxxxx at xxxxxxxxxxxxxxxx> [125/4] 
X-pstn-cave-hit: 


Headers received 2 years ago:

Received: from wrtlnx07.wrtech.com (wrtlnx07.wrtech.com [207.14.178.213])
	by ns.pyerotechnics.com (8.11.6/8.11.6) with ESMTP id k7L8u4921189
	for <yyyyyyyyyyyyy at yyyyyyyyyyyyy>; Mon, 21 Aug 2006 04:56:05 -0400


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This message is copyright PD Inc, subject to license 20080407P00.

Hi,

On Tue, Aug 12, 2008 at 09:38, Jason Pyeron <jpyeron at pdinc.us>
wrote:
> Previously, when our server received an email it would slap the rcpt to in
the
> received headers by adding a for <...> any ideas what has changed?
In my (vast) experience with e-mail (most of it with Postfix though) I
observed this behaviour when the message was for multiple recipients.
IIRC, Postfix adds a "for <...>" only if the message is for one
recipient only. Probably sendmail will do the same, as the problem is
inherent to SMTP mail handling (where one message may be directed to
multiple recipients). I remember the first time I noticed that I was
puzzled by it as well.

HTH,
Filipe