diff --git a/src/hooks/useEmail.js b/src/hooks/useEmail.js
index face4af..af6aabe 100644
--- a/src/hooks/useEmail.js
+++ b/src/hooks/useEmail.js
@@ -151,8 +151,8 @@ export const useEmailList = (mailboxDirNode) => {
 
     const cacheKey = isEmpty(COLI_SN) ? `dir-${VKey}` : `order-${VKey}`
     const readCacheIDList = await readIndexDB(cacheKey, 'maillist', 'mailbox')
-    const readCacheListRowsMap = await readIndexDB(readCacheIDList.data, 'listrow', 'mailbox')
     if (!isEmpty(readCacheIDList)) {
+      const readCacheListRowsMap = await readIndexDB(readCacheIDList.data, 'listrow', 'mailbox')
       const _x = readCacheIDList.data.map((ele) => readCacheListRowsMap.get(ele).data || {})
       setMailList(_x)
       setLoading(false)