1. A method for generating subscription address lists comprising the steps of: receiving a subscription request containing a particular subscriber address; generating a token associated with the particular subscriber address; sending a verification message containing the token to the particular subscriber address; receiving a confirmation message; parsing the confirmation message to extract a received token and a received subscriber address; verifying that the received token is associated with the received subscriber address; and adding the received subscriber address to a subscription address list in response to a successful verification of the confirmation message.