Messages sent to members of a group made using Google Groups might bounce. And when messages bounce, they’re simply dropped. They are not sent to the group or returned to the sender.
Steps to remove the bounce state:
- Sign in to Google Groups.
- At the top right, click Settings > Global settings.
- Review or change your settings:
- Bounce status: See if your email address is flagged to indicate that messages sent to you are bouncing. If so, click the link to remove the bounce status.
- Click Save.
Most common scenario is when there is a problem with the DNS.