17. The software of claim 14 , further comprising: a user interface, which is generated by said software executing on the computer system, said user interface being configured to permit a user to determine whether to create said unique variations that are associated with serial numbers created by the serial number generator.
17. The software of claim 14 , further comprising: a user interface, which is generated by said software executing on the computer system, said user interface being configured to permit a user to determine whether to create said unique variations that are associated with serial numbers created by the serial number generator. 18. The software of claim 17 , wherein said user interface is an interface of an email application.