Why can't I "send as e-mail" in Publisher?

I have created a document using a Newletter e-mail in Publisher, and need to
send it as an e-mail (ie embedded in the e-mail) rather than as an
attachment. All the literature I've read says I should be able to do this,
and that under "Send an Email" under the File menu, there should be two
options: "Send as an attachment" and "Send as an e-mail." For me, the second
option is missing. Can any one help me out to fix this? Thank you!