When a client attempts to send an Excel worksheet by using File Send
to Mail Recipient (as attachment), any message the client includes
with the email message is not included when the message is sent (the
message body appears blank in his sent items box in Outlook 2003).
This same problem does not occur when client sends a worksheet as an
attachment by manually adding an attachment to an Outlook message.

This is using Excel 2003 with the latest service pack on a Windows XP
SP2-based workstation