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Outlook converting attachments into code

My office has a supplier that is now not receiving our email attachments. They recently switched to Outlook 2010. When we send attachments, Outlook seems to convert all the attachments into 50 pages of code garbage. I assume it is on their end, but I'm wondering the reason for it. When they send back what they get from our office, it looks like what I posted below. If you need to see more of the garble, let me know. Thanks in advance for any help you can give.

X-Authority-Analysis: v=1.1 cv=q/+l8z/c4pnswxeNlfvSspGq5Qhrr6fQ1QVuuP3iCk0= c=1 sm=0 a=E3JVC6RVJOUA:10 a=98mLTqaoegCwyw7beBhU8w==:17 a=ar6JvBxVAAAA:8 a=mBmpIsJIN85P_Te_p4MA:9 a=8BiiS35oOoFLEj6nsrcA:7 a=7c0nMWa9CRBd2caSOJTch5cG-O4A:4 a=wPNLvfGTeEIA:10 a=i-1EiFEc6ooA:10 a=6-_ECcqnqsMA:10 a=KXProlzQkdsA:10 a=Wge2UBJLlVsA:10 a=w6sed0etgf8A:10 a=X_Syrzr6DhgA:10 a=MJF-vfZgdBUA:10 a=jJy8Ef6IOrLfn-AW:21 a=JIUxjuwRN2CKctT4:21 a=SSmOFEACAAAA:8 a=Y2VNeNrzAAAA:8 a=yMhMjlubAAAA:8 a=TW66zc2HAAAA:8 a=HQ31llbKAAAA:8 a=jvxJMuiFtHHlPAge--cA:9 a=HhhGh3OKx3XISX0_Jn0A:7 a=czuMrDUTv8wmH3yGv59G0eqZ_2AA:4 a=J3xfwoMtMMoA:10 a=c8hVNb-yVdgUOXdp:21 a=qep2xuTtVUljvYdW:21 a=jFVMj1KZI1aRy_eDVYAA:9 a=wDkcOGQXQ88N15AEjIFfIBbfFAMA:4 a=KQqxNPgzF0kA:10 a=ucH7BwLj_I8A:10 a=NGQPQq8vlMMG60eU:18 a=JLmJ2gJPJZ-6P5ze8bgA:9 a=lmSqsIcKMG80vJSg8g-R9SRhDsgA:4 a=diV1Cm6KfS4A:10 a=_oIkrB6u2AiGUemw:21 a=RC-WjQVhXlqColYZ:21 a=ijuBvAxSAAAA:8 a=3lLbUHl3AZwFFdMowokA:9 a=3mafT1HIy4SYBP7WRAFfL7-m5PAA:4 a=B7Jn2g7OClQA:10 a=zKSThUc_gt-Tp2Ym:21 a=oIfl56DOtWrZzg6R:21 a=98mLTqaoegCwyw7beBhU8w==:117
X-Cloudmark-Score: 0
X-Originating-IP: 24.172.18.202
Received: from [24.172.18.202] ([24.172.18.202:44403] helo=CARY3)
      by cdptpa-bc-oedge01.mail.rr.com (envelope-from <headquarters@isth.org>)
      (ecelerity 2.2.2.39 r()) with ESMTPA
      id 83/D6-16205-B518A6C4; Tue, 17 Aug 2010 12:32:31 +0000
From: "ISTH headquarters" <headquarters@isth.org>
To: =?iso-8859-1?Q?'Ren=E9_Haller_=28MCI_Geneva=29'?= <Rene.Haller@mci-group.com>
Subject: FW: 2012 ISTH SSC -- ACC rental negotiations
Date: Tue, 17 Aug 2010 08:38:30 -0400
Message-ID: <00eb01cb3e09$193b3710$4bb1a530$@org>
MIME-Version: 1.0
Content-Type: multipart/mixed;
      boundary="----=_NextPart_000_00EC_01CB3DE7.92299710"
X-Priority: 1 (Highest)
X-MSMail-Priority: High
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: AQHKtwQIzSYR31zM6EyNLSTDtV0rVZHYmllAgCbDPOCAAZ9p4IABcBpQgAAozZCAQ9SS0IBCS0yggDZZ6bCAEX0yAIAJp4OAgANk54CAAV2JEIAHrMRw
Content-Language: en-us
Importance: High
X-SEF-7853D99-ADF1-478E-8894-213D316B8FFA: 1
X-SEF-ZeroHour-RefID: vtr=0001.0A0B020A.4C6A8161.0358,vl=0,fgs=0
X-SEF-Processed: 6_1_1_00184__2010_08_17_14_32_34

This is a multi-part message in MIME format.

------=_NextPart_000_00EC_01CB3DE7.92299710
Content-Type: multipart/related;
      boundary="----=_NextPart_001_00ED_01CB3DE7.92299710"

------=_NextPart_001_00ED_01CB3DE7.92299710
Content-Type: multipart/alternative;
      boundary="----=_NextPart_002_00EE_01CB3DE7.92299710"

------=_NextPart_002_00EE_01CB3DE7.92299710
Content-Type: text/plain;
      charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Barry Gill

You are probably sending to them in RTF
To change the setings in outlook 2007:
Tools / Options / Mail format - Compose in this message format: HTML ,
and from Internet Format:
When sending Outlook Rich text messages to internet recipients , use this format: Send using HTML.

I would advise this as a first step.

Otherwise you need to look at what devices they have examining data in the path from you to them. Trend Micro WAS (older versions) known to add a line break and empty line in the middle of the headers effectively telling the servers that the headers ended at that line break empty line, so the rest then simply shows as text.

rcaryclark

ASKER

Thanks for the comments barrulus, but we are not sending in RTF. We send in HTML.

I don't know what type system they have on their end. Could it be an issue with their antivirus?

Barry Gill

yes it could, if you have NO OTHER PEOPLE complaining about this, then ask them to talk to their gateway providers.
It could be that they are experiencing the added whiteline in the headers problem when you send to them.

My money is on their AV/AS gateway.

rcaryclark

ASKER

I've been doing some more testing and removing the spaces in the excel document being sent cleared up the problem. I remember this being a problem pre-XP, but I hadn't seen this problem in awhile. Is that still a problem with the receiver?

ASKER CERTIFIED SOLUTION

Barry Gill

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rcaryclark

ASKER

Thanks for the help. I haven't used wireshark, but I'll give it a go.