gforge-mta software package provides virtual package provided by gforge-mta-postfix, gforge-mta-exim4, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gforge-mta
gforge-mta is installed in your system.
Make ensure the gforge-mta package were installed using the commands given below,
$ sudo dpkg-query -l | grep gforge-mta*
You will get with gforge-mta package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Virtual packages |
| Package | gforge-mta |
| Version | |
| Description | virtual package provided by gforge-mta-postfix, gforge-mta-exim4 |
| Sub Section | virtual |