diff --git a/src/apis/client.ts b/src/apis/client.ts
index 04b37c4..1a4f1e2 100644
--- a/src/apis/client.ts
+++ b/src/apis/client.ts
@@ -31,13 +31,24 @@ const processQueue = (error: unknown, token: string | null = null) => {
   failedQueue = [];
 };
 
+const callReissue = async () => {
+  try {
+    const response = await getNewToken();
+    const newToken = response?.data.accessToken;
+    return newToken;
+  } catch (e) {
+    return Promise.reject(e);
+  }
+};
+
 client.interceptors.request.use(
   (config) => {
+    console.log('response again', config);
+
     const accessToken = useAuthStore.getState().accessToken;
     if (config.url !== '/auth/reissue' && accessToken) {
       config.headers.Authorization = `Bearer ${accessToken}`;
     }
-
     return config;
   },
   (error) => Promise.reject(error),
@@ -48,14 +59,12 @@ client.interceptors.response.use(
   async (error) => {
     const setAccessToken = useAuthStore.getState().setAccessToken;
     const logout = useAuthStore.getState().logout;
-    const originalRequest = error.config;
+    const isLoggedIn = useAuthStore.getState().isLoggedIn;
 
-    if (!originalRequest) return Promise.reject(error);
+    const originalRequest = error.config;
 
-    if (
-      originalRequest.url === '/auth/reissue' ||
-      originalRequest.url.includes('/api/auth/token?state=')
-    ) {
+    if (!originalRequest || originalRequest.url === '/auth/reissue') {
+      if (isLoggedIn) logout();
       return Promise.reject(error);
     }
 
@@ -79,27 +88,21 @@ client.interceptors.response.use(
         } catch (e) {
           return Promise.reject(e);
         }
-      }
-
-      isRefreshing = true;
-
-      try {
-        const response = await getNewToken();
-        const newToken = response?.data.accessToken;
-
-        if (!newToken) throw new Error('Failed to refresh token');
-
-        setAccessToken(newToken);
-        processQueue(null, newToken);
-
-        isRefreshing = false;
-        originalRequest.headers.Authorization = `Bearer ${newToken}`;
-        return client(originalRequest);
-      } catch (e) {
-        processQueue(e, null);
-        isRefreshing = false;
-        logout();
-        return Promise.reject(e);
+      } else {
+        isRefreshing = true;
+        try {
+          const newToken = await callReissue();
+          setAccessToken(newToken);
+          processQueue(null, newToken);
+          isRefreshing = false;
+          originalRequest.headers.Authorization = `Bearer ${newToken}`;
+          return client(originalRequest);
+        } catch (e) {
+          processQueue(e, null);
+          isRefreshing = false;
+          if (isLoggedIn) logout();
+          return Promise.reject(e);
+        }
       }
     }
     return Promise.reject(error);
diff --git a/src/apis/mailBox.ts b/src/apis/mailBox.ts
index 7990b34..722e248 100644
--- a/src/apis/mailBox.ts
+++ b/src/apis/mailBox.ts
@@ -12,8 +12,7 @@ export const getMailbox = async () => {
 
 export const getMailboxDetail = async (id: number, pageParam: number) => {
   try {
-    const response = await client.get(`/api/mailbox/${id}?page=${pageParam}&size=20`);
-    // const response = await client.get(`/api/mailbox/${id}`);
+    const response = await client.get(`/api/mailbox/${id}/detail?page=${pageParam}&size=20`);
 
     if (!response) throw new Error('error while fetching mailbox detail data');
     return response.data;
diff --git a/src/main.tsx b/src/main.tsx
index 41bea78..8b87556 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -21,5 +21,5 @@ createRoot(document.getElementById('root')!).render(
       <App />
     </BrowserRouter>
   </QueryClientProvider>,
-  // </StrictMode>,
+  // </StrictMode>
 );
diff --git a/src/pages/LetterBox/index.tsx b/src/pages/LetterBox/index.tsx
index 892cb3e..c8010c9 100644
--- a/src/pages/LetterBox/index.tsx
+++ b/src/pages/LetterBox/index.tsx
@@ -21,6 +21,7 @@ const fetchMailLists = async () => {
   const response = await getMailbox();
   if (!response) throw new Error();
   const data: LetterBoxData[] = response.data;
+  console.log(data);
   // 정렬?
   return data;
 };
@@ -63,7 +64,7 @@ const LetterBoxPage = () => {
                     zipCode={data.oppositeZipCode}
                     letterCount={data.letterCount}
                     isChecked={data.oppositeRead}
-                    isClosed={data.active}
+                    isClosed={!data.active}
                   />
                 )),
               ).map((row, index) =>
diff --git a/src/pages/LetterBoxDetail/components/LetterPreview.tsx b/src/pages/LetterBoxDetail/components/LetterPreview.tsx
index 98967fc..ac4f843 100644
--- a/src/pages/LetterBoxDetail/components/LetterPreview.tsx
+++ b/src/pages/LetterBoxDetail/components/LetterPreview.tsx
@@ -61,7 +61,7 @@ const LetterPreview = forwardRef<HTMLDivElement, LetterPreviewProps>((props, ref
 
   return (
     <LetterWrapper isSender={isSend} onClick={() => handleItemClick(id)} ref={ref}>
-      <p className="body-r text-gray-80 mb-3">{date}</p>
+      <p className="body-r text-gray-80 mb-3">{formatDate(date)}</p>
       <p className="body-m text-gray-80 line-clamp-1 break-all">{title}</p>
     </LetterWrapper>
   );
diff --git a/src/pages/LetterBoxDetail/index.tsx b/src/pages/LetterBoxDetail/index.tsx
index 7baea17..e2b7097 100644
--- a/src/pages/LetterBoxDetail/index.tsx
+++ b/src/pages/LetterBoxDetail/index.tsx
@@ -35,7 +35,7 @@ const LetterBoxDetailPage = () => {
     useInfiniteQuery({
       queryKey: ['mailBoxDetail', userInfo.id],
       queryFn: async ({ pageParam }) => {
-        console.log(`Fetching page: ${pageParam}`); // 디버깅용
+        console.log(`Fetching page: ${pageParam}`);
         const response = await getMailboxDetail(userInfo.id, pageParam);
         console.log(response.data);
         return response.data;
@@ -73,7 +73,7 @@ const LetterBoxDetailPage = () => {
 
   const shareMutation = useMutation({
     // Todo : useAuthStore -> myId 대체
-    mutationFn: () => postShareProposals(selected, 1, userInfo.id, shareComment),
+    mutationFn: () => postShareProposals(selected, userInfo.id, shareComment),
     onSuccess: () => {
       toggleShareMode();
       setShareComment('');
diff --git a/src/utils/formatDate.ts b/src/utils/formatDate.ts
index 6cca28d..2de211c 100644
--- a/src/utils/formatDate.ts
+++ b/src/utils/formatDate.ts
@@ -1,11 +1,12 @@
 const formatDate = (isoString: string) => {
-  const date = new Date(isoString);
+  const trimmedIsoString = isoString.split('.')[0];
+  const date = new Date(trimmedIsoString);
   return date
     .toLocaleDateString('ko-KR', {
       year: 'numeric',
       month: '2-digit',
       day: '2-digit',
     })
-    .replace(/-/g, '.');
+    .replace(/\./g, '.');
 };
 export default formatDate;