How to uninstall amavisd-new-milter from Ubuntu
To uninstall just amavisd-new-milter package itself from Ubuntu execute on terminal:
sudo apt-get remove amavisd-new-milter
Uninstall amavisd-new-milter and it's dependent packages
To uninstall the amavisd-new-milter package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove amavisd-new-milter
If you also want to delete configuration and/or data files of amavisd-new-milter from Ubuntu then this will work:
sudo apt-get purge amavisd-new-milter
To delete configuration and/or data files of amavisd-new-milter and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge amavisd-new-milter
amavisd-new-milter package information
Interface between sendmail-milter and amavisd-new
AMaViSd-new is a script that interfaces a mail transport agent (MTA) with zero or more virus scanners, and spamassassin (optional). It supports all common virus scanners (more than 20 different AVs), with direct talk-to-daemon support for ClamAV, OpenAntiVirus, Trophie, AVG, f-prot, and Sophos AVs. AMaViSd-new supports all MTAs through its generic SMTP/LMTP filter mode (ideal for postfix and exim). It is faster and safer to use the SMTP/LMTP filter mode than using the AMaViS pipe client. It supports sendmail milter through this package. This package contains the milter client, and a generic command line client for amavisd-new.
More information about apt-get remove
Advanced Package Tool, or APT, is a free software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu and other Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.
apt-get is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library.
apt-get remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed.