diff --git a/frontend/src/views/EmailDetail/EmailDetail.js b/frontend/src/views/EmailDetail/EmailDetail.js
index d4c066a..fa3a87a 100644
--- a/frontend/src/views/EmailDetail/EmailDetail.js
+++ b/frontend/src/views/EmailDetail/EmailDetail.js
@@ -26,9 +26,13 @@ export function usePage() {
   const tos = ref([])
   
   const ccs = ref([])
+
+  const bccs = ref([])
   
   const showCC = ref(false)
 
+  const showBCC = ref(false)
+
   const loading = ref(false)
   const loadError = ref('')
   let requestSequence = 0
@@ -47,7 +51,9 @@ export function usePage() {
     detailData.value = {attachments: []}
     tos.value = []
     ccs.value = []
+    bccs.value = []
     showCC.value = false
+    showBCC.value = false
     loadError.value = ''
     loading.value = true
 
@@ -76,6 +82,9 @@ export function usePage() {
       tos.value = parseAddresses(data.to)
       ccs.value = parseAddresses(data.cc)
       showCC.value = ccs.value.length > 0
+      // 仅在本人的发件副本展示密送；后端仍负责所有权校验和收件副本脱敏。
+      bccs.value = data.type === 1 ? parseAddresses(data.bcc) : []
+      showBCC.value = bccs.value.length > 0
     } catch {
       if (sequence === requestSequence) {
         loadError.value = '网络连接失败，请稍后重试'
@@ -165,6 +174,8 @@ export function usePage() {
     tos,
     ccs,
     showCC,
+    bccs,
+    showBCC,
     loading,
     loadError,
     loadDetail,
diff --git a/frontend/src/views/EmailDetail/EmailDetail.vue b/frontend/src/views/EmailDetail/EmailDetail.vue
index 72bb8b7..c954859 100644
--- a/frontend/src/views/EmailDetail/EmailDetail.vue
+++ b/frontend/src/views/EmailDetail/EmailDetail.vue
@@ -61,6 +61,12 @@
                   {{ item.Name !== '' ? item.Name : item.EmailAddress }}<span v-if="index < ccs.length - 1">, </span>
                 </span>
               </span>
+              <span v-if="showBCC" class="cc-section">
+                <span class="meta-label">{{ lang.bcc }}:</span>
+                <span v-for="(item, index) in bccs" :key="'bcc'+index" class="receiver-chip">
+                  {{ item.Name || item.EmailAddress }}<span v-if="index < bccs.length - 1">, </span>
+                </span>
+              </span>
             </div>
           </div>
         </div>
@@ -109,6 +115,8 @@ const {
   tos,
   showCC,
   ccs,
+  showBCC,
+  bccs,
   formatDetailDate
 } = usePage()
 </script>
diff --git a/test/frontend/email-detail.test.mjs b/test/frontend/email-detail.test.mjs
index c22a6f9..4378fba 100644
--- a/test/frontend/email-detail.test.mjs
+++ b/test/frontend/email-detail.test.mjs
@@ -79,6 +79,44 @@ test('异常地址和附件字段不导致页面异常，切换邮件清除旧
   assert.equal(page.showCC.value, false)
 })
 
+test('仅发件副本展示密送名单，切换到收件副本立即清除', async () => {
+  const addresses = '[{"Name":"","EmailAddress":"hidden@example.com"}]'
+  const {page, route} = fixture(async (_, {id}) => ({
+    errorNo: 0,
+    data: {...email(id).data, type: id === 15 ? 1 : 0, bcc: addresses}
+  }))
+  await settle()
+  assert.equal(page.showBCC.value, true)
+  assert.equal(page.bccs.value[0].EmailAddress, 'hidden@example.com')
+  route.params.id = '16'
+  await settle()
+  assert.equal(page.showBCC.value, false)
+  assert.deepEqual(page.bccs.value, [])
+})
+
+test('未知邮件类型和无效密送字段不展示名单，加载失败不残留旧名单', async () => {
+  for (const data of [
+    {bcc: '[{"EmailAddress":"hidden@example.com"}]'},
+    {type: 1, bcc: '{'},
+    {type: 1, bcc: 'null'},
+    {type: 1, bcc: '[]'}
+  ]) {
+    const {page} = fixture(async () => ({errorNo: 0, data: {...email(15).data, ...data}}))
+    await settle()
+    assert.equal(page.showBCC.value, false)
+    assert.deepEqual(page.bccs.value, [])
+  }
+  const {page, route} = fixture(async (_, {id}) => id === 15
+    ? {errorNo: 0, data: {...email(id).data, type: 1, bcc: '[{"EmailAddress":"hidden@example.com"}]'}}
+    : {errorNo: 403, errorMsg: '无权查看邮件'})
+  await settle()
+  assert.equal(page.showBCC.value, true)
+  route.params.id = '16'
+  await settle()
+  assert.equal(page.showBCC.value, false)
+  assert.deepEqual(page.bccs.value, [])
+})
+
 test('切换邮件后旧请求成功或失败均不能覆盖新邮件', async () => {
   for (const staleFailure of [false, true]) {
     let finish