Install kio-sieve by entering the following commands in the terminal:
sudo apt update sudo apt install kio-sieve
Description:
Sieve mail filtering language support for kdepim, development files
This library implements a parser and lexer for Sieve, the mail filtering language (RFC 3028). . This package contains the kio slave for ksieve . This package is part of the KDE PIM module.
Homepage: http://pim.kde.org/
Version: 4:17.12.3-0ubuntu1
Section: universe/libs