While designing email template inside email editor of Ariticmail, you can easily add unsubscribe tag on the text where you need to create a link for unsubscribe.
In the email template editor, select the text where you need to add link, then, click on the add hyperlink button and then add [UNSUBSCRIBE_URL] to the http:// field. Finally, select “others” from drop down and click on ok to save settings.
This tag [UNSUBSCRIBE_URL] will dynamically convert into link for the subscribers who will receive emails.
You can follow this process: