This article will show you how to unsubscribe from all lists at once.
Instructions
Either through the Notify Me Module:
Navigate to Modules. Click on Content, then Notify Me
Select View Site
Or, add /list.aspx to the end of your URL (For Example: www.civiccity.com/list.aspx)
If you aren't already logged in, enter your email address and select Sign In
Select Unsubscribe from All Lists
On the Are you sure you want to unsubscribe from all lists? pop-up message select OK to finalize