cyrus-imapd from home:buschmann23:cyrus:3.2 project
Select Your Operating System
Add repository and install manually
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:buschmann23:cyrus:3.2/15.6/home:buschmann23:cyrus:3.2.repo zypper refresh zypper install cyrus-imapd