Bad news.
The yahoo groups, according to the source below, will be deactivated and the posted content will be deleted soon.
https://www.vice.com/en_us/article/8xwe9p/yahoo-groups-is-winding-down-and-all-content-will-be-permanently-removed
The yahoo groups, according to the source below, will be deactivated and the posted content will be deleted soon.
https://www.vice.com/en_us/article/8xwe9p/yahoo-groups-is-winding-down-and-all-content-will-be-permanently-removed