If you try to send Rich Text Format (RTF) mail to an Internet address
using the CompuServe Mail provider for Microsoft Exchange, you receive the
following non-delivery report:
The following recipients could not be reached...
Receiver(s) not valid for binary message
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This message is returned by CompuServe. CompuServe's gateway to Internet
mail does not support sending binary attachments to Internet recipients.
Since an RTF message is sent as a message with a binary attachment, the
message cannot be sent.
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When you compose new mail for an Internet recipient using the CompuServe
Mail provider, do not enable the CompuServe Mail provider's "Send using
Microsoft Exchange rich-text format" option.
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Microsoft Exchange bundles RTF attributes into a special binary attachment
file called Winmail.dat. If an RTF message is addressed to both CompuServe
and Internet recipients, all the recipients receive an error message, even
though the CompuServe recipients may be capable of receiving a message
with a binary attachment.
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