if you do not wish to have the file uploaded to a specific location on the server, Universal Email can handle this very easily without adding the Upload File Server behavior.
It is a bit more difficult if you wish to upload the file to a specific location on the server using File Upload.
Without File Upload:
On the attachments tab, Select the Submitted file option, then select the file field from the drop down list.
With File Upload:
On the Attachment tab, select the Enter Value option, then click the lightning bolt. from the bindings panel, Expand the Uploaded Files (File Field Name) binding group and select the Server Directory binding. This will add code similar to:
<?php echo $WA_DFP_UploadStatus["WA_UploadResult1"]["serverDirectory"]; ?>
Copy this code, then select the Server File Name binding.
After selecting the server file name, place your cursor at the binding of the binding code and paste the Server Directory code in from of it so that the full code is:
<?php echo $WA_DFP_UploadStatus["WA_UploadResult1"]["serverDirectory"]; ?><?php echo $WA_DFP_UploadStatus["WA_UploadResult1"]["serverFileName"]; ?>