docs: add delete-address api docs (#936)

vitepress-docs/docs/en/guide/feature/delete-address.md

@@ -0,0 +1,42 @@
+# Delete Address API
+
+## Admin Delete Address API
+
+Delete an address by address ID. This endpoint requires admin auth and deletes related data (mails, sender settings, bindings, etc.).
+
+```bash
+DELETE /admin/delete_address/:id
+```
+
+Header:
+
+- `x-admin-auth: <admin_password>`
+
+Example response:
+
+```json
+{ "success": true }
+```
+
+## User Delete Address API
+
+Delete mailbox by address JWT. The request needs address token permission and deletes related data (received mails, sent items, auto reply data, sender bindings, user bindings, telegram bind records).
+
+```bash
+DELETE /api/delete_address
+```
+
+Headers:
+
+- `Authorization: Bearer <address_jwt>`
+
+Notes:
+
+- `ENABLE_USER_DELETE_EMAIL` must be enabled.
+- Address credential can be obtained from `/api/new_address` or `/admin/new_address`.
+
+Example response:
+
+```json
+{ "success": true }
+```