Installing sieve on an existing system

Hi everyone I installed exim yes --dovecot yes --sieve no -, As you can see without sieve. The question is simple, is it possible to install sieve on the already existing Hestia? Configuration Ngnix+PHP+Mariabd and what I wrote above mail server

Yes, execute this command:

/usr/local/hestia/install/upgrade/manual/install_sieve.sh

Just in case, before executing the script, backup dirs; /etc/exim4/, /etc/dovecot/ and /etc/roundcube/