I'm trying to build mailman 2.1.39 on Ubuntu 22.04 and ran into the following:

***** dnspython <2.0 not found. It is required for the new
***** dmarc_moderation_action feature. Get it from
***** <dnspython.org/> or
***** <pypi.python.org/pypi/dnspython…
***** You must get a version < 2.0

An early version is not provided in Ubuntu's repositories, and both of the websites the config file references also do not any longer have pre-2.0 versions.

If anyone knows where to get an older version, that info would be appreciated.