postfix software package provides High-performance mail transport agent, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install postfix
postfix is installed in your system.
Make ensure the postfix package were installed using the commands given below,
$ sudo dpkg-query -l | grep postfix *
You will get with postfix package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | |
| Package | postfix |
| Version | 2.11.0-1 |
| Description | High-performance mail transport agent |
| Sub Section |