"No Mail Relay" or, if you must, "Relay for Addresses."
Both require SMTP authentication. You are correct that any other method is insecure. Sandy Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
