Delivery reports for Exchange 2007 unreadable in Outlook XP

Hi All,
I have recently put in an exchange 2007 setup with 2 hub transfer servers. Some users are using Outlook 2007 but most are using Outlook xp. Internal NDR or Delivery reports are displayed fine in both versions however ndr or delivery reports that are sent from my smpt relay are only displayed in Outlook 2007. Outlook xp users see them in unreadable format or Chinese characters. If they forward the message then it displayes fine. I have tried everything I can think of to resolve this. My external smtp relay is a MIMEsweeper for SMTP from Clearswift
AGOITAsked:
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AGOITAuthor Commented:
Unfortunatly Ive discovered the only way to properly fix this is to upgrade to Outlook 2003 or 2007
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Can you check if they have the most recent updates and also disable Add-ons for search or third parties in outlook.
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AGOITAuthor Commented:
Everything is fully updated and no additional add-ons are installed or running
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Do we have any AV on the server and client. On the Exchange server if the AV is file scanner do we have the exclusions set for not scanning the Exchanege files. Also if you see from OWA are you able to see them fine ?
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AGOITAuthor Commented:
I have AV running on both the server and client. Server has a dedicated Exchange scanner and does a on access scan. My Organisation does not use OWA and we have it disabled
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Can we disable AV on the client side and also if there is any other third party.
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AGOITAuthor Commented:
No Joy. Still showing up in Chinese on the Outlook XP but fine on Outlook 2007
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Can you create a new profile in Outlook in English and verify or if there is any other Outlook XP client please try out there.
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AGOITAuthor Commented:
I have tried this on several Outlook XP clients and they are all the same. Created new profiles and no joy
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Humm no idea.
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