If you are talking about sending an e-mail with an attachment from your site, that can be done with eForm.
If you are talking about adding jot style comments with attachments I don’t think that there is a snippet that does this. You may be able to have a fileUpload snippet within the newspublisher form so that you caould upload a file and then add it as a TV to a new document. You may need to do something custom.
