You are using the unsubscribe feature managed by Mindbaz for your campaigns and wish to personalize the appearance of the unsubscribe page.
By default, the unsubscribe page displayed after a subscriber clicks the unsubscribe link will show the name of your database, as illustrated below:
You wish to modify the yellow-highlighted section to display "la newsletter de XXX"
To achieve this, you only need to add a parameter to the unsubscribe URL used in your campaign's sending configuration.
The parameter to add is: a=XXX (encode spaces with %20).
For example, if you want the page to display "Désabonnement de la newsletter de XXX", simply append &a=la%20newsletter%de%XXX to the end of the unsubscribe URL.