diff --git a/lib/api/mailboxes.js b/lib/api/mailboxes.js
index 7e6df492..680161b3 100644
--- a/lib/api/mailboxes.js
+++ b/lib/api/mailboxes.js
@@ -377,7 +377,7 @@ module.exports = (db, server, mailboxHandler) => {
                 },
                 pathParams: {
                     user: userId,
-                    mailbox: mailboxId
+                    mailbox: mailboxId.allow('resolve')
                 },
                 response: {
                     200: {