https://en.wikipedia.org/wiki/Special:Permalink/587601619#Create_new_user_group_for_m:MassMessage
Following discussion on the English Wikipedia, the "massmessage-sender" user group should be added, grantable and removable by local administrators.
This bug follows the model of bug 57611.
Version: wmf-deployment
Severity: enhancement
URL: https://en.wikipedia.org/wiki/Special:Permalink/587601619#Create_new_user_group_for_m:MassMessage