0 present participle of unsubscribe
1 to get an organization or business to remove your name from its mailing list so that you no longer receive email or post from them, or to remove someone's name from such a list
As a result, tasks such as subscribing and unsubscribing are only handled by sending mail messages.
The emails do contain a link for unsubscribing from their solicitations.
For years, end users have been told not to trust email unsubscribe links, so many users hit the spam button as an alternative to unsubscribing.