In Mesopotamian mythology, Zaqar is the messenger of the god Sin. He relays these messages to mortals through his power over their dreams and nightmares.
Zaqar is designed to aid penetration testers in creating spoofed emails to conduct social engineering attacks. This sleek, simple tool allows testers to send an email looking as if it came from any email address with options of using a rich text editor or raw text.
When crafting your email you have two options: you can either build it using the rich text editor (which will convert the message to HTML) or you can send the message as raw text. While rich text allows more flexibility in how a message can be presented, not all mail clients render HTML correctly or at all. You need to research your target in order to know if the rich text editor is appropriate--when in doubt, use the raw editor.