There is an unsubscribe link in emails you send out. Via the unsubscri

Hi all,David,

can you point me in the right direction to troubleshoot the 'unsubscribe script'  because the mails I send out are without any 'unsubscribe link'.
I would like to know in which part of the script the unsubscribe link is made.

PS: the subscribe run well, my mails are sent out.