Sending an email through a Web or Client interface is easy. I’m going to show you how to send an email manually via telnet. I am going to keep it basic, as I don’t want to make this a long drawn out book about MX and MTA’s. So lets get to it… MTA (Mail/Message Transfer Agent) – Wikipedia Link MX (Mail Exchange) Record  – Wikipedia Link In a nut shell, MTA’s are the routers of the Mail world. MX...