fastforward software package provides handles qmail forwarding according to a cdb database, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install fastforward
fastforward is installed in your system.
Make ensure the fastforward package were installed using the commands given below,
$ sudo dpkg-query -l | grep fastforward *
You will get with fastforward package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | |
| Package | fastforward |
| Version | 1:0.51-3ubuntu1 |
| Description | handles qmail forwarding according to a cdb database |
| Sub Section |