Email has been and continues to be one of the most widely used communication tools in the world. This is due in part to the fact that email is versatile, fast and easy to use. More and more people are turning to email as their primary form of communication.

However, as email usage has increased, so too has the amount of email that needs to be handled. This has led to the development of SMTP, or Simple Mail Transfer Protocol, which is a protocol used to send and receive email.