This module allows you to create customized e-mails to target specific victims. The aim of this module is to integrate a payload into the attachment and send it across to the victim via a spoofed e-mail.

You need to select the second option, that is Create a FileFormat Payload, which will guide you to select a specific file format to exploit. The entire menu is easy to follow and self-explanatory:

Next, select a specific payload that you want to use; it will prompt you to select the type of command shell that you want to execute when the victim machine is successfully exploited. The reverse TCP shell and meterpreter reverse TCP shell are the most useful ones as outbound traffic is more likely to be allowed through the firewall on the client side:

As you move ahead selecting some additional options, the social engineering toolkit will prompt you to select a prebuilt e-mail template or the option to build the contents of the e-mail all by yourself. The predefined e-mail...