When the nym server gets a message addressed to the nym, it appends it to the nym's reply block and sends it to the first remailer in the chain, which sends it to the next and so on until it reaches your real address. It is considered good practice to include instructions to encrypt it on the way, so that someone (or some organization) doing in/out traffic analysis on the nym server cannot easily match the message received by you to the one sent by the nym server.
When the nym? s?erver gets a message addressed to the nym, it appends it to the nym's reply bl,ock and sends it to the first remailer in the chain, which sends it to the next and so on until it reaches your real address. It is considered good practice to include instructions to encrypt it on the way, so that someo?ne (or some organization) doing in/out traffic analysis on the nym server cannot easily match the message received by you to the one sent by the nym server.