lsb-invalid-mta software package provides Linux Standard Base sendmail dummy, 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 lsb-invalid-mta
lsb-invalid-mta is installed in your system.
Make ensure the lsb-invalid-mta package were installed using the commands given below,
$ sudo dpkg-query -l | grep lsb-invalid-mta *
You will get with lsb-invalid-mta package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Miscellaneous |
| Package | lsb-invalid-mta |
| Version | 4.1+Debian11ubuntu6 |
| Description | Linux Standard Base sendmail dummy |
| Sub Section | misc |