Klint,
    Thanks for the thought and quick response.
    I probably did not give you enough of the header for proper analysis.  Here 
is the
whole header with (for privacy) "client" substituted for the actual client and 
"Friend"
for her friend that sent this e-mail:
-------------------------
Received: from psmtp.com (unverified [12.158.34.135]) by mail.Hocking.net
 (EMWAC SMTPRS 0.83) with SMTP id <[EMAIL PROTECTED]>;
 Fri, 27 Feb 2004 15:58:55 -0500
Received: from source ([69.58.21.51]) by exprod5mx76.postini.com 
([12.158.34.245]) with
SMTP;
 Fri, 27 Feb 2004 13:03:50 PST
Received: (qmail 19377 invoked from network); 27 Feb 2004 21:03:47 -0000
Received: from unknown (HELO Dude) ([EMAIL PROTECTED])
  by mail.frognet.net with SMTP; 27 Feb 2004 21:03:47 -0000
Message-ID: <[EMAIL PROTECTED]>
From: "Friend" <[EMAIL PROTECTED]>
To: "client" <[EMAIL PROTECTED]>
References: <[EMAIL PROTECTED]>
Subject:  back
Date: Fri, 27 Feb 2004 16:03:46 -0500
MIME-Version: 1.0
Content-Type: multipart/alternative;
 boundary="----=_NextPart_000_0006_01C3FD4B.47B19220"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
X-pstn-levels:     (S:84.24023/99.86168 R:95.9108 P:95.9108 M:99.1180 C:79.5348 
)
X-pstn-settings: 3 (1.0000:2.0000) r p m C
X-pstn-addresses: from <[EMAIL PROTECTED]> [db-null]
-------------------------
    Does this still indicate a problem?  The strange thing is that this client 
reports
that the friend can send e-mail to others without a problem.  Also, when this 
friend sends
an e-mail from a web account, no problem -- just from her frognet account.
        I think that it really should go through.  When a CR (not CFLF) shows, 
it usually
looks like a black block.  Since I do not have any of those in either the 
header or body,
the message should go through, but it does not.
            Is the [EMAIL PROTECTED] acceptable?  All that I know for sure is 
that it us
unusual in a header.
                Thanks.
                  Rich
-----Original Message-----
From: Klint Gore <[EMAIL PROTECTED]>
To: [email protected] <[email protected]>
Date: Monday, March 01, 2004 5:33 PM
Subject: Re: "from unknown (HELO Dude) ([EMAIL PROTECTED])" is not downloadable


>On Mon, 1 Mar 2004 17:13:35 -0500, "Rich Warren" <[EMAIL PROTECTED]> wrote:
>> Hello,
>>     This is the strangest one that I have seen...
>>     One of our clients cannot download mail from only one of her friends.  
>> Headers
>> indicate that her friend's machine puts out the following as the source 
>> received by her
>> ISP:
>> "from unknown (HELO Dude) ([EMAIL PROTECTED])".
>>     The message gets to our server and has been verified to be clean of Viri.
>>      Outlook express, however, cannot download the message.  There are no 
>> strange
>> characters like "carrige returns without line feeds".  As far as I can tell, 
>> the only
>> unusual thing is that her friend's machine is putting out this unusual 
>> version of
source
>> IP.  I think that it is allowed by RFC's, but it is unusual in other e-mail 
>> that is on
our
>> server.
>
>the : is missing from after the from.  outlook is known for not liking
>invalid messages.  the BNF from rfc822 for header fields says
>     field       =  field-name ":" [ field-body ] CRLF
>
>it should be
>"from: unknown (HELO Dude) ([EMAIL PROTECTED])"
>
>is there an x-mailer tag in the header?  if so, tell them to report a
>bug.
>
>klint.
>
>+---------------------------------------+-----------------+
>: Klint Gore                            : "Non rhyming    :
>: EMail   : [EMAIL PROTECTED]           :  slang - the    :
>: Snail   : A.B.R.I.                    :  possibilities  :
>: Mail      University of New England   :  are useless"   :
>:           Armidale NSW 2351 Australia :     L.J.J.      :
>: Fax     : +61 2 6772 5376             :                 :
>+---------------------------------------+-----------------+
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