You do *not* need to email everyone.
Short version: Click the link at the bottom of this email and follow the prompts.
1. Click the link in the footer of every email (this:
https://lists.wikimedia.org/mailman/listinfo/open-glam )
2. scroll down to the 'change my settings or unsubscribe'.
3. Insert the email address you are subscribed with, then click the button.
4. On that page is a button that says "unsubscribe". Click it.
5. You will receive an email requesting confirmation, click the link.
6. Once complete you will receive a final email confirming that you have been successfully unsubscribed.
These instructions also work for most other mailing lists you are on.
- Liam
p.s. I am *not* a moderator of this mailing list. Don't write to me privately to ask me to remove you.