Outlook adresses not receiving attachments

Question

Hello everybody,

I apologize if this has been answered before, but our colleagues in Switzerland are trying to send emails with attachments to our other office and it fails, but only with Outlook adresses. Can anyone please help?

X-CreatedBy: MessageSnapshot-Begin injected headers
X-MessageSnapshot-UTC-Time: 2010-07-12T06:38:36.291Z
X-MessageSnapshot-Record-Id: 3266
X-MessageSnapshot-Source: OnRoutedMessage,Journaling Agent
X-Sender: p.schweizer@bluewin.ch
X-Receiver: schweizblumen@harsh.com .ch
http://schweizblumen.ch
X-EndOfInjectedXHeaders: MessageSnapshot-End injected headers
Received: from CAPS-PER-EX1.bluewin.ch ([127.0.0.1]) by caps-per-ex1
([127.0.0.1]) with mapi; Mon, 12 Jul 2010 14:38:35 +0800
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binaryFrom: Matthew Sampson
To: "schweizblumen@harsh.com .ch"
Date: Mon, 12 Jul 2010 14:38:35 +0800
Subject: Plain Text Test Email
Thread-Topic: Plain Text Test Email
Thread-Index: AcshjMv1dlpmCgONQJ2XofbMlypxSw==
Message-ID: <4dac02e2e52f584ca7a90ddcfee6f89204bfd55d9f@caps-per-ex1>
Accept-Language: en-US, en-AU
Content-Language: en-US
X-MS-Has-Attach: yes
X-HSCG-Spam-Score: 87 [XXXXX]
X-Junk-Score: 87 [XXXXX]
(44%) BODY: contains "dosage"
(10%) SUBJ: contains multiple "!" marks
X-Color: red
Received: from DUB004-OMC4S6.hotmail.com ([157.55.2.81] verified) by

Thank you very much

Paula