Achieving perfect hallucinations with e-mail slave?

Since e-mail slave can govern post-hypnotic suggestion, it should also be able to make some hallucinate, right? For example, could you create effects similar to files like CursedPlugs by mere suggestions using e-mail slave?
And if so, the bigger question is how? Should the subject simply listen to the e-mail slave file more often so the suggestions in the e-mails get stronger? Or perhaps a technique consisting of daily visualization with the suggestion that it will become more real with every time?
And if so, the bigger question is how? Should the subject simply listen to the e-mail slave file more often so the suggestions in the e-mails get stronger? Or perhaps a technique consisting of daily visualization with the suggestion that it will become more real with every time?