Pay2Send Sender Options The advenge pay2send system maintains a individual record for all senders of e-maail. Your record includes how we are to determine if a message that appears to be from you is really from you or not, and other options pertaining to the pay-to-send aspects of ths system. By default, we do no authentication: we will trust that messages appearing to be from you@your.isp are really from you@your.isp. You may turn on "RAPNAP (Return Address, Peer Network Address Pair) AUTHENTICATION" if you like, which will prevent most spoofing. Turning on RAPNAP authentication is reccommended for all users. With RAPNAP authentication turned on, we will only accept messages appearing to be from you@your.isp when the message is coming into our e-mail servers from a machine listed in either the record for your.isp (if it exists) or directly in your sender record. The strictest level of sender authentication that advenge pay2send server can insist on involves public key encryption. With signature-checking enabled, all messages from you must (1) be signed with your public key (2) must have a recent, accurate date stamp and (3) must not have been seen by advenge server before. (Implementation of this screening level is being deferred until a habitual message signer appears who is willing to test the system.) Editing your sender options can be done with the sender options editing tool at http://www.pay2send,com/cgi/sender_edit