My users can't unsubscribe from easydsicuss notifications (complaints)

Hello,

I'd already reported this some months ago, seems thats always the case.
Some members disabled all of their email notifications on their dashboard and still receive emails for discussions,
There is no unsubscription url in the emails footer, seems to be random, some time there is, some time not.
i am receiving lot of complaints from users and i am getting troubles.

can you include a link that realy unsubscribre people from discussions ? current or all.