Hi, What do you think about adding plugins to the standard roundcube installation.
managesieve - Advanced filters (Sieve)
markasjunk - RoundCube has a very convenient 'markasjunk' plugin, which moves an email to the spam folder and allows sending it to our SpamAssassin for training to mark similar emails as spam.
password - It provides the ability to change the password in the RoundCube panel.
twofactor_gauthenticator or kolab_2fa or twofactor_webauthn - Two-factor authentication