I have set up a user to receive an email report of their backup, however, they are receiving reports for all clients.
Thanks for the report! I think I see the bug and have fixed it. I still have to test.
If this is a critical issue for you please say so and I will update the 0.40.1 RCs faster.
Not hugely critical at the moment, as I am still testing. Looking forward to getting the fix when it is ready.