perl-Mail-SPF from openSUSE:Leap:42.2 project
Select Your Operating System
Add repository and install manually
For standard run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Leap:42.2/standard/openSUSE:Leap:42.2.repo zypper refresh zypper install perl-Mail-SPF