perl-DateTime-Format-Mail from devel:languages:perl:CPAN-D project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:perl:CPAN-D/openSUSE_Tumbleweed/devel:languages:perl:CPAN-D.repo zypper refresh zypper install perl-DateTime-Format-Mail
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:perl:CPAN-D/15.4/devel:languages:perl:CPAN-D.repo zypper refresh zypper install perl-DateTime-Format-Mail