Install roundcube-plugins by entering the following commands in the terminal:
sudo apt update sudo apt install roundcube-plugins
Description:
skinnable AJAX based webmail solution for IMAP servers - plugins
RoundCube Webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality expected from an e-mail client, including MIME support, address book, folder manipulation and message filters. . The user interface is fully skinnable using XHTML and CSS 2. . This package provides several plugins for Roundcube. They should be enabled in the configuration of Roundcube.
Homepage: https://www.roundcube.net/
Version: 1.3.6+dfsg.1-1
Section: universe/web