The first e-mail programs were created in the late 60s/early 70s—simpler times, when everyone on the network was trustworthy. Even knowing what we know today about spammers, we still tend to take e-mail for granted, and trust it far more than it deserves. Learn about the components of the e-mail system, understand how e-mail moves on the Internet, and find out how to interpret e-mail message headers.
an Email , Typical Mailing List Message , Mailing-List Program , Email Deliverability , Mail Exchange , MX , Email Best Practices , Email 101 White Paper , 1 Introduction The flow of email on the Internet is both surprisingly simple and surprisingly complex. It is simple because the basic email protocols are decades-old plain-text protocols with very simple definitions. It is complex because many tiny details can have a profound influence on how mail flows and on how to interpret message headers. This doc