1. A computer-implemented method performed by a data processing apparatus, the method comprising: for an individual, associating a phishing simulation record of the individual with an e-mail alias of the individual and associating the e-mail alias of the individual with a primary e-mail address of the individual; sending via a computer network one or more simulated phishing messages to the individual via the e-mail alias associated with the individual; generating a phishing simulation record based on a response by the individual to the one or more simulated phishing messages, wherein, for the individual, the phishing simulation record of the individual is associated with the primary e-mail address of the individual only through the e-mail alias of the individual; wherein, after sending the one or more messages, disassociating by a computer processor the primary e-mail address of the individual from the e-mail alias of the individual such that phishing susceptibility attribution is precluded for the individual.