* Gareth Hastings <[EMAIL PROTECTED]> [2006-05-03 16:25:19 +0100]:
[...]
Content-Description: fromclient.txt
> Return-Path: <[EMAIL PROTECTED]>
> Received: from mwinf3102.me.freeserve.com (mwinf3102.me.freeserve.com)
>  by mwinb3105 (SMTP Server) with LMTP; Wed, 03 May 2006 12:51:46 +0200
> X-Sieve: Server Sieve 2.2
> Envelope-to: [EMAIL PROTECTED]
> Received: from me-wanadoo.net (localhost [127.0.0.1])
>  by mwinf3102.me.freeserve.com (SMTP Server) with ESMTP id 039851C0129B
>  for <[EMAIL PROTECTED]>; Wed,  3 May 2006 12:51:46 +0200 (CEST)
> Received: from lonas01.kinexus.net (lonas01.kinexus.net [212.113.24.129])
>  by mwinf3102.me.freeserve.com (SMTP Server) with ESMTP id 89F0A1C012A0
>  for <[EMAIL PROTECTED]>; Wed,  3 May 2006 12:51:45 +0200 (CEST)
> X-ME-UUID: [EMAIL PROTECTED]
> Received: from localhost (localhost [127.0.0.1])
>  by lonas01.kinexus.net (Postfix) with ESMTP id 2C33D24D88;
>  Wed,  3 May 2006 11:51:34 +0100 (BST)
> Received: from retrac-group.com (unknown [217.206.172.205])
>  by lonas01.kinexus.net (Postfix) with SMTP id 036EC24C6D;
>  Wed,  3 May 2006 11:49:27 +0100 (BST)
> Received: from mail pickup service by retrac-group.com with Microsoft SMTPSVC;
>   Wed, 3 May 2006 12:00:59 +0100

As has been mentioned by others in the thread, this is a problem with the 
POP3 connector in the SBS version of Exchange. For the 2003 version it is 
easily patched but it has only recently been upgraded to 'critical' by 
Micorsoft (although I've not particularly noticed that this has helped).

The above headers suggest the problem lies with 217.206.172.205 which 
appears to be an Easynet IP. I'd suggest sending these headers on to 
[EMAIL PROTECTED]

[...]
Content-Description: sentbacktome.txt
> Received: from gaspra.twi.co.uk ([194.128.9.3]) by tatum.twi.co.uk with 
> Microsoft SMTPSVC(6.0.3790.1830);
>        Wed, 3 May 2006 15:21:31 +0100
> Received: from (psmtp.com) [207.126.144.51] 
>       by gaspra.twi.co.uk with smtp 
>       id 1FbI8m-0002Mb-00 ; Wed, 03 May 2006 15:15:44 +0100
> Received: from source ([207.38.45.145]) by eu1sys200amx011.postini.com 
> ([207.126.147.10]) with SMTP;
>       Wed, 03 May 2006 14:21:26 UTC
> Received: from [80.247.87.62] (account [EMAIL PROTECTED] HELO 
> morgan-marine.com)
>   by appereto.com (CommuniGate Pro SMTP 4.3.7)
>   with ESMTPA id 530246130; Wed, 03 May 2006 07:21:16 -0700
> Received: from mail pickup service by morgan-marine.com with Microsoft 
> SMTPSVC;
>        Wed, 3 May 2006 15:15:52 +0100

If this is another mail from the 'loop' then 80.247.87.62 probably has an 
issue too. This appears to be Quik Internet, [EMAIL PROTECTED]

Since there can often be a number of problematic hosts within the 
distribution list (spread across multiple ISPs) you may want to check a 
random sampling of the headers from all the mails received, if you have 
access to this.

You mentioned in your port that a Demon host was possibly involved, 
although I don't see any evidence of this in the headers. If you do 
suspect that a Demon host is causing problems can you send the full 
headers on to [EMAIL PROTECTED] and it will get actioned ASAP.

HTH.

-- 
James Hoddinott

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