For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/server:Kolab:Extras/openSUSE_Tumbleweed/server:Kolab:Extras.repo
zypper refresh
zypper install php-pear-Mail_Mime
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/server:Kolab:Extras/16.0/server:Kolab:Extras.repo
zypper refresh
zypper install php-pear-Mail_Mime
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/server:Kolab:Extras/15.6/server:Kolab:Extras.repo
zypper refresh
zypper install php-pear-Mail_Mime
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/server:Kolab:Extras/15.5/server:Kolab:Extras.repo
zypper refresh
zypper install php-pear-Mail_Mime
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/server:Kolab:Extras/15.4/server:Kolab:Extras.repo
zypper refresh
zypper install php-pear-Mail_Mime