Unsubscribe from a group

You can stop getting emails from a group by leaving the group or changing your settings.

1. Sign in to Google Groups.
2. Click My Groups.
3. Choose a group.
4. 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>