The remailer accepts PGP-encrypted messages. You can get the public PGP key by sending mail with Subject: remailer-key to <%RMA>. If you want to send an anonymous message, first create a file with two colons in the first line of your message, and the line "Anon-To: address" in the following line. Follow that with a blank line and begin your message. For example: ================================================================== :: Anon-To: beth@example.org This is some anonymous mail. ================================================================== Then, encrypt it with the PGP key of this remailer. Finally, send <%RMA> a message that begins with two colons and the line "Encrypted: PGP", followed by your encrypted message: ================================================================== From: joe@test.com To: %RMA :: Encrypted: PGP -----BEGIN PGP MESSAGE----- Version: 2.6.3i owE1jMsNwjAUBH3gZMk9PClnUoBPUANpwElW2OBPZD8H0gd1UCP2gduuNDNfIcSH T4zCbQmtlbzGFM9T0jSD7QVvEzaPcUlBSSWHQclbnR9YWJNp5BFSLdR9CijF3NGx ybry/1Rsqn4la3a0JiIhLvnYGCu9HFtiC8oIxnlkeuIYe+EH =HgDq -----END PGP MESSAGE----- ================================================================== The remailer will decrypt the message and forward it anonymously. The following e-mail would be delivered to : ================================================================== From: %RMN <%RAA> Comments: This message did not originate from the Sender address above. It was remailed automatically by anonymizing remailer software. Please report problems or inappropriate use to the remailer administrator at <%CA>. To: beth@example.org This is some anonymous mail. ================================================================== You will often want to include a Subject or other header lines in your anonymous mail. You can insert header lines in the anonymous message by preceding them with a "##" line in the unencrypted file: ================================================================== :: Anon-To: jim@example.org ## Subject: Re: Twofish In-Reply-To: Your message of "Tue, 12 Jan 1999 22:47:04 EST." <199901130247.WAA02761@example.com> This reply is anonymous. ================================================================== Even though PGP encryption is very secure, this still leaves some information open to attackers. For example, if someone gets an anonymous message whenever you have sent an encrypted message to a remailer, it is likely that you are the sender of those messages. You can instruct the remailer to delay your messages for some time or send it empty messages to make such analysis harder: If you use the line "Null:" instead of "Anon-To:", the remailer will discard your message. The "Latent-Time:" header causes the remailer to keep your message for some time before forwarding it. "Latent-Time: +2:00" would delay the message for two hours. You can use a random delay by adding "r", for example "Latent-Time: +5:00r" would delay the message for up to five hours. You can, of course, use another remailer to send the message to <%RMA> anonymously. For example, take the message ================================================================== :: Anon-To: %RMA :: Encrypted: PGP -----BEGIN PGP MESSAGE----- Version: 2.6.3i owE1jMsNwjAUBH3gZMk9PClnUoBPUANpwElW2OBPZD8H0gd1UCP2gduuNDNfIcSH T4zCbQmtlbzGFM9T0jSD7QVvEzaPcUlBSSWHQclbnR9YWJNp5BFSLdR9CijF3NGx ybry/1Rsqn4la3a0JiIhLvnYGCu9HFtiC8oIxnlkeuIYe+EH =HgDq -----END PGP MESSAGE----- ================================================================== encrypt it with the PGP key of the Replay remailer and send the double-encrypted message to . If you send your messages through a chain of several independent remailers, it will be hard to trace the anonymous message back to you. A much more secure solution, however, is to use Mixmaster for sending anonymous mail. PGP encryption can also be used to receive mail at an anonymous address. Please see , the home page of the nym.alias.net pseudonym server, for more information.