You are still able to browse past messages from the ACT and RFT listservs that have occurred prior to the Summer/Fall of 2013, when the listservs were still hosted through Yahoo Groups.
Although both of these Yahoo groups are now inactive, you can download a file containing the complete listserv history from the ACBS website. Follow this link for more information about that option.
For posts that occurred after the transition of the listservs to the ACBS website in the Summer/Fall of 2013 until the launch of the updated website in February 2024, an archive is available here: https://contextualscience.org/listserv_archive_20242013
Please note: You must be a current ACBS member to view the archive.