If you are looking at the groups via NNTP, you can look at the headers:
In Outlook Express, File, Properties, Details tab:
----------------------------------------------
Date: Sat, 15 Oct 2005 13:43:31 +0200
From: Tom Emmelot <
[email protected]>
User-Agent: Thunderbird 1.4 (Windows/20050908)
MIME-Version: 1.0
Subject: Re: Auto Updates
References: <
[email protected]>
<
[email protected]>
<
[email protected]>
In-Reply-To: <
[email protected]>
Content-Type: multipart/mixed;
boundary="------------060504000308000805010205"
Message-ID: <
[email protected]>
Newsgroups: microsoft.private.security.spyware.announcements
NNTP-Posting-Host: 62.194.19.175
Path:
cpmsftngsa06.privatenews.microsoft.com!TK2MSFTNGSA02.privatenews.microsoft.com
Lines: 1
Xref: cpmsftngsa06.privatenews.microsoft.com
microsoft.private.security.spyware.announcements:8028
-----------------------------------------------------------------
This is an NNTP post, versus Williams12345 to which you responded:
------------------------------------------------------------------------
Thread-Topic: Auto Updates
thread-index: AcXRK5jLOo7ZRcP3Q46FkhiyhMoC2g==
X-WBNR-Posting-Host: 71.138.86.212
From: "=?Utf-8?B?d2lsbGlhbXMxMjM0NQ==?="
<
[email protected]>
References: <
[email protected]>
<
[email protected]>
Subject: Re: Auto Updates
Date: Fri, 14 Oct 2005 18:56:02 -0700
Lines: 30
Message-ID: <
[email protected]>
MIME-Version: 1.0
Content-Type: text/plain;
charset="Utf-8"
Content-Transfer-Encoding: 7bit
X-Newsreader: Microsoft CDO for Windows 2000
Content-Class: urn:content-classes:message
Importance: normal
Priority: normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.0
Newsgroups: microsoft.private.security.spyware.announcements
NNTP-Posting-Host: TK2MSFTNGXA03.phx.gbl 10.40.2.250
Path: cpmsftngsa06.privatenews.microsoft.com!TK2MSFTNGXA03.phx.gbl
Xref: cpmsftngsa06.privatenews.microsoft.com
microsoft.private.security.spyware.announcements:8022
-------------------------------------------------------------------------
This line:
X-Newsreader: Microsoft CDO for Windows 2000
is the tip-off that this was posted via the web interface. Such posts are
often referred to as "CDO" posts by folks--generally as a term of
opprobrium--since many such posts never bring about any response or further
evidence that the O.P. ever saw the responses.
The newer interface should improve on this, I hope--but we'll see how many
people actually use it.
--