The {{unsubscribe_link_all}} HubL token outlined in the Email variables section of this documentation requires the contact to click a button on the landing page, so it's not currently possible to accomplish this without two clicks in a HubSpot email.
That said, it would be possible to opt an email out in one "click" by triggering a request to this endpoint with a button outside of an email.
The {{unsubscribe_link_all}} HubL token outlined in the Email variables section of this documentation requires the contact to click a button on the landing page, so it's not currently possible to accomplish this without two clicks in a HubSpot email.
That said, it would be possible to opt an email out in one "click" by triggering a request to this endpoint with a button outside of an email.