Manual:$wgEnableSpecialMute

Email settings: $wgEnableSpecialMute
Set to true to enable the Special Mute page.
Introduced in version:1.34.0 (Gerrit change 511781; git #ed13d3fa)
Removed in version:Still in use
Allowed values:(boolean)
Default value:false

Details

edit

Set to true to enable the Special Mute page. This allows users to mute unwanted communications from other users, and is linked to from emails originating from Special:Email.