So if you’re using emaildelivery.com as your ESP and you are designing your email outside from the platform such as in Figma using Emailify, then you know you need to include the unsubscribe link.
The tag that emaildelivery use is {{!!unsublink}}. So ensure when you designing your email, link your button or whatever to the tag above – {{!!unsublink}}
You’re good to go. When use click the unsubscribe link, then user will be able to unsubscribe from your mailing list.