Install cyrus-nntpd by entering the following commands in the terminal:
sudo apt update sudo apt install cyrus-nntpd
Description:
Cyrus mail system - NNTP support
This package contains the NNTP (Network News Transfer Protocol) portion of the Cyrus IMAPd suite. . For more information, please see the cyrus-common package.
Homepage: http://www.cyrusimap.org/
Version: 2.5.10-3ubuntu1
Section: universe/mail