Install php-horde-webmail by entering the following commands in the terminal:
sudo apt update sudo apt install php-horde-webmail
Description:
Horde Groupware Webmail Edition
Horde Groupware Webmail Edition is a free, enterprise ready, browser based communication suite. Users can read, send and organize email messages with three different webmail interfaces and manage and share calendars, contacts, tasks and notes with the standards compliant components from the Horde Project. . This package is part of Horde, a web application Framework written in PHP with modules like IMP (webmail), Turba (contacts), Kronolith (calendar), Nag (task list), Gollem (file manager), etc.
Homepage: http://www.horde.org/
Version: 5.2.22-1
Section: universe/php