then the default redirection path will be used when a subscriber unsubscribes from a list using the unsubscribe link in a mailing.
You can edit the default redirection paths used in mailings by going to
Integration -> Subscription Forms
and clicking on Edit by the Default Subscription Form
You will then see a list of redirection paths along with a drop down that allows you to set redirection paths for subscription and unsubscription. You can leave it set to use the default message, create a custom message, or use a redirect URL
If a subscriber subscribes to your list using a custom HTML subscription page which you generate in the system then the redirection path you set under form completion options will be used.
To set a custom redirection path for a subscription form go to
Integration -> Subscription Forms
and click on edit by the form you want to change the redirection path for and then hit the form completion tab.