WINMAIL.DAT

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Scenario: I am using COM objects to automate Outlook 2003 in a corporate setting. My program creates a new message, adds SMTP recipient, sets BodyFormat to plain text, adds subject and body, attaches a spread***, and sends message.

Problem: Non-Outlook recipient receives WINMAIL.DAT instead of Excel attachment. This also happens when performing the above steps manually using the Outlook 2003 progran itself.

More info: I don't have this problem at home, where I have Outlook 2003 internet-only-- the attachment is sent as a spread*** and not as WINMAIL.DAT.

Solution I cannot use: The user will not make a global setting to set all messgages to use plain text.

What I'm considering: I could create a contact and try setting the message format on a 'per recipient' basis. However, I can't find a COM object property for the 'Internet Format' setting that appears in Outlook on the contact properties page.

Anyone have a clue why it's so hard to stop WINMAIL.DAT from being sent?

What about the contact property I mentioned ('Internet Format') - is there a COM object property for this?
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