libmilter-dev software package provides Sendmail Mail Filter API (Milter), 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 libmilter-dev
libmilter-dev is installed in your system.
Make ensure the libmilter-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libmilter-dev *
You will get with libmilter-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | libmilter-dev |
| Version | 8.14.4-4.1ubuntu1 |
| Description | Sendmail Mail Filter API (Milter) |
| Sub Section | libdevel |