OpenWebMail
https://help.ubuntu.com/community/OpenWebMail
Webmail is software which allows you to view email from any computer, anywhere in the world, through your web browser. OpenWebMail is a simple, fast and popular webmail package. The website is here. This guide will enable you to setup webmail on your own server, for use either within your home network, or outside.
sudo dpkg -i owm2.53-2.deb