Built-in Tags and Filters
unsubscribe_link
unsubscribe_link
tag outputs a link to unsubscribe from the message’s subscription group.
unsubscribe_link
is critical for marketing emails, for both legal and user experience reasons. It should be included in the footer of your email, along with your company name, and address e.g.
unsubscribe_url
unsubscribe_url
tag to only output the URL.