postfixadmin software package provides Virtual mail hosting interface for Postfix, 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 postfixadmin
postfixadmin is installed in your system.
Make ensure the postfixadmin package were installed using the commands given below,
$ sudo dpkg-query -l | grep postfixadmin *
You will get with postfixadmin package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Administration Utilities |
| Package | postfixadmin |
| Version | 2.3.5-3 |
| Description | Virtual mail hosting interface for Postfix |
| Sub Section | Admin |