@vmassol thanks for your reply 
.
Unfortunately I do not understand any of your explanation nor suggestion to change this behavior 
:
- What is the interest to change the user which sends the notifications? The notification will still be sent but just by an other user …
- The question I’m asking myself is: what’s the purpose of the schedule job to change the JobClass(0) from “None” to “Normal” on 4 pages each week?
- Furthermore I’m not able to unsubscribe from theses pages: for instance going to https://tutos.myxwiki.org/xwiki/bin/view/Mail/MailResender
- the “bell icon” is greyed => telling user he won’t be warned on changes
- when clicking on the bell to force an “un-subscription” => an endless loader is displayed like shown in the below screen shot …
Waiting for your advices,