Для openSUSE Factory zSystems запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:cboltz/openSUSE_Factory_zSystems/home:cboltz.repo
zypper refresh
zypper install mailgraph
Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:cboltz/16.0/home:cboltz.repo
zypper refresh
zypper install mailgraph
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:cboltz/15.6/home:cboltz.repo
zypper refresh
zypper install mailgraph
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:cboltz/15.5/home:cboltz.repo
zypper refresh
zypper install mailgraph
Для 15.4 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:cboltz/15.4/home:cboltz.repo
zypper refresh
zypper install mailgraph