For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:buschmann23:cyrus:3.0/openSUSE_Tumbleweed/home:buschmann23:cyrus:3.0.repo
zypper refresh
zypper install cyrus-imapd
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:buschmann23:cyrus:3.0/openSUSE_Slowroll/home:buschmann23:cyrus:3.0.repo
zypper refresh
zypper install cyrus-imapd
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:buschmann23:cyrus:3.0/15.6/home:buschmann23:cyrus:3.0.repo
zypper refresh
zypper install cyrus-imapd
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:buschmann23:cyrus:3.0/15.5/home:buschmann23:cyrus:3.0.repo
zypper refresh
zypper install cyrus-imapd