Groups uses an automated system to test and reactivate email accounts that bounce.
However, moderators may also manually reactivate or unsubscribe bouncing members. Groups with an error, we assume the message was successfully delivered and automatically reactivate the member's account. This process does not require any work from the moderator or member. Under Members on the left side of the page, click on the Bouncing link. Click on the Edit link next to the bouncing member.