Our users have been noticed that cannot change the settings clicking on the highlighted "buttons" at the end of the recommended e-mail, and they view the message that you see in fig. 2.

Fig. 1

Fig. 2
Moreover, from the "Manage Notifications" , the "M" letter is not visible as you notice...
Please let me know, which could be the solution.
Thank you,
Elena
PS. The version we have is 8.5.7