I too have ported rss2email-3.9. This port allows for 2.70 and 3.9 to be installed simultaneously and provides directions for converting data formats from 2.70 to 3.9. https://thomaslevine.com/scm/mystuff/uv/mail/rss2email-pypi.tar.gz
Because Sebastien Marie noted, > So be prepared changing upstream again soon. I have also prepared a port that uses the new upstream. It uses a different package of the the same version of the software. I still prefer the above PyPI version to avoid dependence on the proprietary service GitHub, but I don't think it really matters. https://thomaslevine.com/scm/mystuff/uv/mail/rss2email-github.tar.gz This patch converts the contents of the first tarball into those of the second. https://thomaslevine.com/scm/mystuff/uv/mail/rss2email-github.diff