| List name | Post address | Description |
|---|---|---|
| Wren | wren@lists.wikimedia.org | Wikimedians in Residence Exchange Network |
| Wwh | wwh@lists.wikimedia.org | Wiki World Heritage User Group |
| Xmldatadumps-l | xmldatadumps-l@lists.wikimedia.org | Discussion List for Wikimedia's XML Database Dumps |
| XTools | xtools@lists.wikimedia.org | Discussion list for xTools |