**Task:** If at least one mention failed after a save, send the editor a notification including the failure reasons.
**Failure reasons to be covered:**
* user name not found
* Message: Your mention for "UserX" was not sent because the user was not found.
* > 50 mentions
* Message: Your mentions were not sent because they exceeded the limit of 50 mentions at a time.Be aware:
* anonymous user * If there is more than one mention failure reason per save, the notification has a collapsable part
* Message: Your men* Behind the "..." of the notification for 100.200.300 was not sent, because the user is anonymous.is a link to an explanation of mention behavior called "Learn more about mentions"
* mention on own page:
* Message: Your mention for "UserY" was not sent because you mentioned him/her on his/her own page.
* message to self:
* Message: Your mention was not sent because it was addressed to yourself. * As shown in the screen shots, below is a link, either called "View mentions" or "<the name of the page". In both cases, the link leads to the section where the mentions were made
**Screenshots:** + Failure reasons to be covered**:
To come. As a first sneak peak see {Please use the latest text/screenshot version in the comments of F4171034}
**Background:** This task is based on a wish that received 21 points (#9) in the German Community Wishlist[1]. Originally, the wish was to receive an information about the sent messages. To keep the number of notifications smaller, and to help people use mentions in a way that they are sent, the task informs about mention failures, and adds the reasons for the failure as well.
[1] Link to wish (in German): https://de.wikipedia.org/wiki/Wikipedia:Umfragen/Technische_W%C3%BCnsche_2015/Topw%C3%BCnsche#Bei_Speichern_Hinweis_.C3.BCber_abgegebene_Benachrichtigungen_.5BUmfrage_2015.5D
in English: https://meta.wikimedia.org/wiki/WMDE_Technical_Wishes#Notifications_about_failed_mentions