By default the CKEditorPlugin is NOT enabled in phpList v3.6.5 (or at least it wasn't in my installation).
Config ->
Manage Plugins ->
CKEditorPlugin ->
Enable
By default the CKEditorPlugin is NOT enabled in phpList v3.6.5 (or at least it wasn't in my installation).
Config ->
Manage Plugins ->
CKEditorPlugin ->
Enable