php-pear-Net-Sieve - Handles talking to a sieve server
http://rpms.famillecollet.com/fedora/26/remi/i386/
# rpm -Uvh remi-release*rpm
# dnf --enablerepo=remi install php-pear-Net-Sieve
2018-03-04 - Remi Collet <remi@remirepo.net> - 1.4.3-1 - update to 1.4.3
2018-02-14 - Remi Collet <remi@remirepo.net> - 1.4.2-1 - update to 1.4.2 (no change) - install tests as documentation
2018-02-09 - Fedora Release Engineering <releng@fedoraproject.org> - 1.4.1-3 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild