This is required for the official reference letsencrypt client in EL6.
python-pyrfc3339-1.0-2.el7 has been submitted as an update to Fedora EPEL 7. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2015-c3edb5cbbd
python-pyrfc3339-1.0-2.el7 has been pushed to the Fedora EPEL 7 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with $ su -c 'yum --enablerepo=epel-testing update python-pyrfc3339' You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2015-c3edb5cbbd
python-pyrfc3339-1.0-2.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.
mistakenly closed when epel7 was build. this bug is about epel6.
We won't package certbot for EPEL6, RHEL 6 will be EOL this year and certbot will drop Python 2 support at some point.