Ubuntu 14.04 Trusty LTS Postfix Mail Server Quick Start
How to Install and Getting Started with Postfix MTA Mail Server for Ubuntu 14.04 Trusty Tahr LTS GNU+Linux Server/Desktop.
Postfix is a message transport agent (MTA) that transport messages from a mail user agent (MUA, or mail client) to a remote mail server with SMTP.
Postfix Security is rooted in its default configuration settings. With Postfix you don’t need to change anything and it’s easy to run a Safe MTA.
 
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Open a Shell Session 
 Ctrl+Alt+t on desktop
 (Press “Enter” to Execute Commands)  In case first see: Terminal QuickStart Guide. 
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Installing Postfix Mail Server. sudo apt-get install postfix If Got “User is Not in Sudoers file” then see: How to Enable sudo For an OnLine Internet Site Just Accept the Default Value.  Next Insert your Fully Qualified Domain Name.  
 To install also the Postfix Docs run:sudo apt-get install postfix-doc 
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How to Manage a Multi-Domain Mail Server with PostfixAdmin. 
