Yahoo Groups will be shut down on December 15, but Yahoo Mail will continue to function normally.
On October 14, 2020, Yahoo Customer Care told a concerned netizen on Twitter that the Yahoo Groups website would be shut down, but that change would not affect Yahoo Mail services, as Yahoo Mail is a different product.
Yahoo Mail services will continue to function as usual, and there will be no changes to a Yahoo Mail account, photos, or other features. The only difference is that a user who is a part of Yahoo Groups will no longer send or receive emails from Yahoo Groups. Any emails sent and received in the past will also remain in the email account.