You can stop getting emails from a group by leaving the group or changing your settings.
- Sign in to Google Groups.
- Click My Groups.
- Choose a group.
- In the upper-right corner, click
Leave this group.
- To leave the group and stop getting emails, click Leave this group.
- To stay in the group but stop getting emails, click Stop sending email.
Problems unsubscribing
If you tried to unsubscribe and still get unwanted emails, try these solutions:
- Make sure you unsubscribed using the same email address that gets the group's emails.
- Check whether the emails are forwarded from another address.
- Make sure you’re not signed up for the group with more than one email address.
<source: https://support.google.com/groups/answer/46608?hl=en&ref_topic=2458613>