Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:opensuse_zh/openSUSE_Tumbleweed/home:opensuse_zh.repo
zypper refresh
zypper install mailcheck
Для openSUSE Slowroll запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:opensuse_zh/openSUSE_Slowroll/home:opensuse_zh.repo
zypper refresh
zypper install mailcheck
Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:opensuse_zh/16.0/home:opensuse_zh.repo
zypper refresh
zypper install mailcheck
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:opensuse_zh/15.6/home:opensuse_zh.repo
zypper refresh
zypper install mailcheck
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:opensuse_zh/15.5/home:opensuse_zh.repo
zypper refresh
zypper install mailcheck
Для 15.4 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:opensuse_zh/15.4/home:opensuse_zh.repo
zypper refresh
zypper install mailcheck