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Retrieves the message option properties for a particular address type.
The IMAPISession::QueryDefaultMessageOpt method retrieves the one or more message option properties that a transport provider supports for the address type that the lpszAdrType parameter points to. Message option properties control a message's behavior after it is submitted to the transport provider; they are part of the message envelope, not its content.
The property value array that the lppOptions points to includes the property tags and values for each of the message option properties.