The method resides on a standard email system including a client computer that contains a physical email address and an email server. A client control program, which resides on the client computer and an alias email server, which communicates with the client over the data communications network, are added. The method includes entering the physical email address into the client control program, together with client identification information. The alias email server then generates an alias email address, which is communicated back to the user, and additionally is stored in the alias email server. The client then makes the alias email address available to selected correspondent. Response emails are intercepted by the alias email server, and either forwarded to the client, filtered, or blocked. The client is provided with a log of all transactions, including the time and date, alias email addresses, and other user-created information.