Manual:$wgBlockAllowsUTEdit

User rights, access control and monitoring: $wgBlockAllowsUTEdit
Allow blocked users to edit their talk pages
Introduced in version:1.5.0 (r10003)
Removed in version:Still in use
Allowed values:(boolean)
Default value:true (1.26+)
false (1.5-1.25)

Details

Set $wgBlockAllowsUTEdit to true to allow blocked users to edit their talk pages (so that they can request unblocking, for example). This will add an "Editing their own talk page" checkbox on Special:Block, unchecked by default (see Manual:Block and unblock ). If it's set to false, the checkbox disappears.

See also

Basic user rights and block settings: