diff --git a/src/constant/itemids.js b/src/constant/itemids.js
new file mode 100644
index 0000000..fc098c3
--- /dev/null
+++ b/src/constant/itemids.js
@@ -0,0 +1,650 @@
+export const ItemList = [
+  '10001',
+  '10002',
+  '10003',
+  '10004',
+  '10005',
+  '10006',
+  '10009',
+  '10010',
+  '10011',
+  '10012',
+  '10013',
+  '10014',
+  '10015',
+  '10016',
+  '10017',
+  '10018',
+  '20001',
+  '20002',
+  '20003',
+  '20004',
+  '20005',
+  '20006',
+  '20007',
+  '20008',
+  '20009',
+  '20010',
+  '30100',
+  '30200',
+  '30300',
+  '30400',
+  '30500',
+  '30600',
+  '30700',
+  '30800',
+  '30900',
+  '31000',
+  '40101',
+  '40102',
+  '40201',
+  '40202',
+  '40301',
+  '40302',
+  '40401',
+  '40501',
+  '40601',
+  '40602',
+  '40701',
+  '40702',
+  '40801',
+  '40802',
+  '40901',
+  '40902',
+  '41001',
+  '50001',
+  '50002',
+  '50003',
+  '50004',
+  '50005',
+  '50006',
+  '50007',
+  '50008',
+  '50009',
+  '50010',
+  '60000',
+  '60003',
+  '70001',
+  '70002',
+  '70003',
+  '70004',
+  '70005',
+  '70006',
+  '70007',
+  '70008',
+  '70009',
+  '70010',
+  '80001',
+  '80002',
+  '80003',
+  '80004',
+  '80005',
+  '80006',
+  '80007',
+  '90001',
+  '90002',
+  '90003',
+  '900004',
+  '900005',
+  '900006',
+  '101001',
+  '100001',
+  '100002',
+  '100003',
+  '100004',
+  '100005',
+  '100006',
+  '100007',
+  '91000',
+  '90004',
+  '90005',
+  '90006',
+  '110001',
+  '130001',
+  '130002',
+  '130003',
+  '130004',
+  '130011',
+  '130012',
+  '130013',
+  '130014',
+  '130021',
+  '130022',
+  '130023',
+  '130024',
+  '140001',
+  '110290',
+  '110291',
+  '110292',
+  '110293',
+  '110294',
+  '110295',
+  '110296',
+  '110297',
+  '110298',
+  '110299',
+  '110101',
+  '110111',
+  '110121',
+  '110131',
+  '110141',
+  '110151',
+  '110161',
+  '110171',
+  '110181',
+  '110201',
+  '110211',
+  '110221',
+  '110231',
+  '110241',
+  '110251',
+  '110261',
+  '110271',
+  '110281',
+  '170001',
+  '170002',
+  '150101',
+  '150102',
+  '150103',
+  '150201',
+  '150202',
+  '150203',
+  '160001',
+  '160002',
+  '160003',
+  '160004',
+  '160005',
+  '160006',
+  '160007',
+  '160008',
+  '160009',
+  '160010',
+  '190001',
+  '190002',
+  '190003',
+  '200001',
+  '200002',
+  '200003',
+  '200004',
+  '200005',
+  '200006',
+  '200007',
+  '200008',
+  '200009',
+  '200010',
+  '200011',
+  '210001',
+  '210002',
+  '210003',
+  '210011',
+  '210012',
+  '900001',
+  '900002',
+  '900003',
+  '240001',
+  '250001',
+  '260001',
+  '260002',
+  '260003',
+  '260004',
+  '260010',
+  '27010001',
+  '27020001',
+  '280001',
+  '280002',
+  '280003',
+  '280004',
+  '280005',
+  '280006',
+  '280007',
+  '280008',
+  '280009',
+  '280010',
+  '280011',
+  '280012',
+  '280013',
+  '280014',
+  '280015',
+  '280016',
+  '280017',
+  '280018',
+  '280019',
+  '280020',
+  '280021',
+  '280022',
+  '280023',
+  '280024',
+  '280025',
+  '280026',
+  '280027',
+  '280028',
+  '280029',
+  '280030',
+  '280031',
+  '280032',
+  '280033',
+  '280034',
+  '280035',
+  '280036',
+  '280037',
+  '280038',
+  '280039',
+  '280040',
+  '280041',
+  '280042',
+  '280043',
+  '280044',
+  '280045',
+  '280046',
+  '280047',
+  '280048',
+  '280049',
+  '280050',
+  '280051',
+  '280052',
+  '280053',
+  '280054',
+  '280055',
+  '280056',
+  '280057',
+  '280058',
+  '280059',
+  '280060',
+  '280061',
+  '280062',
+  '280063',
+  '280064',
+  '280065',
+  '280066',
+  '280067',
+  '280068',
+  '280069',
+  '280070',
+  '280071',
+  '280072',
+  '280073',
+  '280074',
+  '280075',
+  '280076',
+  '280077',
+  '280078',
+  '280079',
+  '280080',
+  '280081',
+  '280082',
+  '280083',
+  '280084',
+  '280085',
+  '280086',
+  '280087',
+  '280088',
+  '280089',
+  '280090',
+  '280091',
+  '280092',
+  '280093',
+  '280094',
+  '280095',
+  '280096',
+  '280097',
+  '280098',
+  '280099',
+  '280100',
+  '280101',
+  '280102',
+  '280103',
+  '280104',
+  '280105',
+  '280106',
+  '280107',
+  '280108',
+  '280109',
+  '280110',
+  '280111',
+  '280112',
+  '280113',
+  '280114',
+  '280115',
+  '280116',
+  '280117',
+  '280118',
+  '280119',
+  '280120',
+  '280121',
+  '280122',
+  '280123',
+  '280124',
+  '280125',
+  '280126',
+  '280127',
+  '280128',
+  '280129',
+  '280130',
+  '280131',
+  '280132',
+  '280133',
+  '280134',
+  '280135',
+  '280136',
+  '280137',
+  '280138',
+  '280139',
+  '280140',
+  '280141',
+  '280142',
+  '280143',
+  '280144',
+  '280145',
+  '280146',
+  '280147',
+  '280148',
+  '280149',
+  '280150',
+  '280151',
+  '280152',
+  '280153',
+  '280154',
+  '280155',
+  '280156',
+  '280157',
+  '280158',
+  '280159',
+  '280160',
+  '280161',
+  '280162',
+  '280163',
+  '280164',
+  '280165',
+  '280166',
+  '280167',
+  '280168',
+  '280169',
+  '280170',
+  '280171',
+  '280172',
+  '280173',
+  '280174',
+  '280175',
+  '280176',
+  '280177',
+  '280178',
+  '280179',
+  '280180',
+  '280181',
+  '280182',
+  '280183',
+  '280184',
+  '280185',
+  '280186',
+  '280187',
+  '280188',
+  '280189',
+  '280190',
+  '280191',
+  '280192',
+  '280193',
+  '280194',
+  '280195',
+  '280196',
+  '280197',
+  '280198',
+  '280199',
+  '280200',
+  '280201',
+  '280202',
+  '280203',
+  '280204',
+  '280205',
+  '280206',
+  '280207',
+  '280208',
+  '280209',
+  '280210',
+  '280211',
+  '280212',
+  '280213',
+  '280214',
+  '280215',
+  '280216',
+  '280217',
+  '280218',
+  '280219',
+  '280220',
+  '280221',
+  '280222',
+  '280223',
+  '280224',
+  '280225',
+  '280226',
+  '280227',
+  '280228',
+  '280229',
+  '280230',
+  '280231',
+  '280232',
+  '280233',
+  '280234',
+  '280235',
+  '280236',
+  '280237',
+  '280238',
+  '280239',
+  '280240',
+  '280241',
+  '280242',
+  '280243',
+  '280244',
+  '280245',
+  '280246',
+  '280247',
+  '280248',
+  '280249',
+  '280250',
+  '280251',
+  '280252',
+  '280253',
+  '280254',
+  '280255',
+  '280256',
+  '280257',
+  '280258',
+  '280259',
+  '280260',
+  '280261',
+  '280262',
+  '280263',
+  '280264',
+  '280265',
+  '280266',
+  '280267',
+  '280268',
+  '280269',
+  '280270',
+  '280271',
+  '280272',
+  '280273',
+  '280274',
+  '280275',
+  '280276',
+  '280277',
+  '280278',
+  '280279',
+  '280280',
+  '280281',
+  '280282',
+  '280283',
+  '280284',
+  '280285',
+  '280286',
+  '280287',
+  '280288',
+  '280289',
+  '280290',
+  '280291',
+  '280292',
+  '280293',
+  '280294',
+  '280295',
+  '280296',
+  '280297',
+  '280298',
+  '280299',
+  '280300',
+  '290001',
+  '300000',
+  '300001',
+  '300002',
+  '300003',
+  '300004',
+  '300005',
+  '400101',
+  '400102',
+  '400103',
+  '400104',
+  '400105',
+  '400106',
+  '400201',
+  '400202',
+  '400203',
+  '400204',
+  '400205',
+  '400206',
+  '400301',
+  '400302',
+  '400303',
+  '11130100',
+  '11230100',
+  '11330100',
+  '11430100',
+  '11530100',
+  '11630100',
+  '11130200',
+  '11230200',
+  '11330200',
+  '11430200',
+  '11530200',
+  '11630200',
+  '11130300',
+  '11230300',
+  '11330300',
+  '11430300',
+  '11530300',
+  '11630300',
+  '11130400',
+  '11230400',
+  '11330400',
+  '11430400',
+  '11530400',
+  '11630400',
+  '11130500',
+  '11230500',
+  '11330500',
+  '11430500',
+  '11530500',
+  '11630500',
+  '11130600',
+  '11230600',
+  '11330600',
+  '11430600',
+  '11530600',
+  '11630600',
+  '11130700',
+  '11230700',
+  '11330700',
+  '11430700',
+  '11530700',
+  '11630700',
+  '11130800',
+  '11230800',
+  '11330800',
+  '11430800',
+  '11530800',
+  '11630800',
+  '11130900',
+  '11230900',
+  '11330900',
+  '11430900',
+  '11530900',
+  '11630900',
+  '11131000',
+  '11231000',
+  '11331000',
+  '11431000',
+  '11531000',
+  '11631000',
+  '11213001',
+  '11213002',
+  '11213003',
+  '11213004',
+  '11213005',
+  '11213006',
+  '11213007',
+  '11213008',
+  '11213009',
+  '11213010',
+  '11213011',
+  '11213012',
+  '11213013',
+  '11213014',
+  '11213015',
+  '11213016',
+  '11213017',
+  '11213018',
+  '11213019',
+  '11213020',
+  '11213021',
+  '11213022',
+  '11213023',
+  '11213024',
+  '11213025',
+  '11213026',
+  '11213027',
+  '11213028',
+  '11213029',
+  '11213030',
+  '11213031',
+  '11213032',
+  '11213033',
+  '11213034',
+  '11213035',
+  '11213036',
+  '11213037',
+  '11213038',
+  '11213039',
+  '11213040',
+  '11213041',
+  '11213042',
+  '11213043',
+  '11213044',
+  '11213045',
+  '11213046',
+  '11213047',
+  '11213048',
+  '11213049',
+  '11213050',
+  '11213051',
+  '11213052',
+  '11213053',
+  '11213054',
+  '11213055',
+  '11213056',
+  '11213057',
+  '11213058',
+  '11213059',
+  '11213060',
+  '11213061',
+  '11213062',
+  '11213063',
+  '11213064',
+  '11213065',
+  '11213066',
+  '11213067',
+  '11213068',
+  '11213069',
+  '11213070',
+  '11213071',
+  '11213072',
+  '11510017',
+  '11610018',
+  '30000001'
+]
diff --git a/src/views/email/create.vue b/src/views/email/create.vue
index 9ca675d..79a1dcb 100644
--- a/src/views/email/create.vue
+++ b/src/views/email/create.vue
@@ -8,6 +8,13 @@
         </el-button>
       </sticky>
       <div class="createPost-main-container">
+        <el-row>
+          <el-col :span="10">
+            <el-form-item label-width="120px" label="unikey:" class="postInfo-container-item" prop="unikey" required>
+              <el-input v-model="postForm.unikey" :maxlength="100" placeholder="max 100 char" required :readonly="isupdate" />
+            </el-form-item>
+          </el-col>
+        </el-row>
         <el-row>
           <el-col :span="10">
             <el-form-item label-width="120px" label="发送时间:" class="postInfo-container-item" prop="sendtime">
@@ -21,12 +28,12 @@
           </el-col>
           <el-col v-show="userRegVisible" :span="10">
             <el-form-item label-width="120px" label="注册时间>=:" class="postInfo-container-item" prop="user_reg_start_time">
-              <el-date-picker v-model.number="postForm.user_reg_start_time" type="datetime" format="yyyy-MM-dd HH:mm:ss" value-format="timestamp" placeholder="Select date and time" required />
+              <el-date-picker v-model.number="postForm.user_reg_start_time" type="datetime" format="yyyy-MM-dd HH:mm:ss" value-format="timestamp" placeholder="Select date and time" :required="userRegVisible" />
             </el-form-item>
           </el-col>
           <el-col v-show="userRegVisible" :span="10">
             <el-form-item label-width="120px" label="注册时间<=:" class="postInfo-container-item" prop="user_reg_end_time">
-              <el-date-picker v-model.number="postForm.user_reg_end_time" type="datetime" format="yyyy-MM-dd HH:mm:ss" value-format="timestamp" placeholder="Select date and time" required />
+              <el-date-picker v-model.number="postForm.user_reg_end_time" type="datetime" format="yyyy-MM-dd HH:mm:ss" value-format="timestamp" placeholder="Select date and time" :required="userRegVisible" />
             </el-form-item>
           </el-col>
         </el-row>
@@ -34,15 +41,15 @@
         <el-row>
           <el-col :span="24">
             <el-form-item style="margin-bottom: 40px;" prop="subject">
-              <MDinput v-model="postForm.subject" :maxlength="100" name="subject" required>
+              <MDinput v-model="postForm.subject" :maxlength="100" name="subject" placeholder="max 100 chars" required>
                 邮件标题
               </MDinput>
             </el-form-item>
             <el-form-item prop="content" style="margin-bottom: 30px;" label="邮件正文:">
-              <el-input v-model="postForm.content" type="textarea" :rows="6" />
+              <el-input v-model="postForm.content" type="textarea" :maxlength="1024" placeholder="max 1024 chars" :rows="6" />
             </el-form-item>
             <el-form-item style="margin-bottom: 30px;" label="附件:">
-              <el-input v-model="postForm.attachments" type="textarea" :rows="6" />
+              <el-input v-model="postForm.attachments" type="textarea" :maxlength="256" placeholder="max 256 chars" :rows="6" />
             </el-form-item>
           </el-col>
         </el-row>
@@ -67,6 +74,7 @@ import MDinput from '@/components/MDinput/index.vue'
 import { addMail, updateEmail } from '@/api/mail'
 import { parseTime } from '@/utils'
 import { MAIL_TYPE_GROUP, MAIL_TYPE_ALL } from '@/constant/constant'
+import { ItemList } from '@/constant/itemids'
 
 export default {
   name: 'Email',
@@ -75,6 +83,7 @@ export default {
     return {
       postForm: {
         mailtype: MAIL_TYPE_GROUP,
+        unikey: '',
         sendtime: '',
         expiretime: '',
         user_reg_start_time: '',
@@ -113,17 +122,18 @@ export default {
           }
         ]
       },
-      userRegVisible: true,
+      userRegVisible: false,
       groupMailVisible: true,
       mailTypeVisible: true,
-      dialogStatus: 'create'
+      dialogStatus: 'create',
+      isupdate: false
     }
   },
   watch: {
     'postForm.mailtype'(val) {
       switch (val) {
         case MAIL_TYPE_GROUP:
-          this.userRegVisible = true
+          this.userRegVisible = false
           this.groupMailVisible = true
           break
         case MAIL_TYPE_ALL:
@@ -141,6 +151,7 @@ export default {
     if (mailid) {
       this.mailTypeVisible = false
       this.dialogStatus = 'update'
+      this.isupdate = true
       const editEmail = JSON.parse(sessionStorage.getItem('editEmail' + mailid))
       this.postForm = editEmail
 
@@ -156,8 +167,10 @@ export default {
       this.postForm.user_reg_start_time = editEmail.user_reg_start_time * 1000
       this.postForm.user_reg_end_time = editEmail.user_reg_end_time * 1000
       this.postForm.recipients = editEmail.recipients.join('\n')
+      this.postForm.unikey = editEmail.unikey
     } else {
       this.dialogStatus = 'create'
+      this.isupdate = false
       sessionStorage.removeItem('editEmail' + mailid)
     }
   },
@@ -167,22 +180,64 @@ export default {
       const data = JSON.parse(JSON.stringify(this.postForm))
       data.sendtime = data.sendtime / 1000
       data.expiretime = data.expiretime / 1000
-      data.user_reg_start_time = data.user_reg_start_time / 1000
-      data.user_reg_end_time = data.user_reg_end_time / 1000
+      if (data.mailtype === MAIL_TYPE_GROUP) {
+        data.user_reg_start_time = 0
+        data.user_reg_end_time = 0x7FFFFFFF
+        this.postForm.user_reg_start_time = 0
+        this.postForm.user_reg_end_time = 0x7FFFFFFF * 1000
+      } else {
+        data.user_reg_start_time = data.user_reg_start_time / 1000
+        data.user_reg_end_time = data.user_reg_end_time / 1000
+      }
       console.log('valid begin')
-      data.recipients = data.recipients.split('\n')
-      var arr = data.attachments.split('\n')
-      arr.forEach((item, index) => {
-        var recipientsArr = {}
-        var itemArr = item.split(':')
-        recipientsArr['itemid'] = parseInt(itemArr[0])
-        recipientsArr['itemnum'] = parseInt(itemArr[1])
-        arr[index] = recipientsArr
-      })
+      var list = []
+      if (data.recipients != null && data.recipients !== '') {
+        var j = 0
+        data.recipients.split('\n').forEach((item, index) => {
+          if (item != null && item !== '') {
+            list[j] = item
+            j++
+          }
+        })
+      }
+      data.recipients = list
+
+      var arr = []
+      if (data.attachments != null && data.attachments !== '') {
+        j = 0
+        var itemerr = false
+        data.attachments.split('\n').some(item => {
+          var itemArr = item.split(':')
+          if (itemArr[0] != null && itemArr[0] !== '' && itemArr[1] != null && itemArr[1] !== '') {
+            if (!this.checkItem(itemArr[0])) {
+              this.$message({
+                message: 'unknown item id ' + itemArr[0],
+                type: 'error',
+                duration: 2000
+              })
+              itemerr = true
+              return true
+            }
+            var recipientsArr = {}
+            recipientsArr['itemid'] = parseInt(itemArr[0])
+            recipientsArr['itemnum'] = parseInt(itemArr[1])
+            arr[j] = recipientsArr
+            j++
+          }
+        })
+
+        if (itemerr) {
+          return
+        }
+      }
       data.attachments = arr
       try {
         this.$refs['postForm'].validate((valid) => {
           console.log('valid end', valid)
+          if (this.postForm.mailtype === MAIL_TYPE_GROUP) {
+            this.postForm.user_reg_start_time = ''
+            this.postForm.user_reg_end_time = ''
+          }
           if (valid) {
             addMail(data).then(response => {
               if (response.code === 0) {
@@ -208,16 +263,50 @@ export default {
       data.expiretime = data.expiretime / 1000
       data.user_reg_start_time = data.user_reg_start_time / 1000
       data.user_reg_end_time = data.user_reg_end_time / 1000
-      console.log('valid begin')
-      data.recipients = data.recipients.split('\n')
-      var arr = data.attachments.split('\n')
-      arr.forEach((item, index, arr) => {
-        var recipientsArr = {}
-        var itemArr = item.split(':')
-        recipientsArr['itemid'] = parseInt(itemArr[0])
-        recipientsArr['itemnum'] = parseInt(itemArr[1])
-        arr[index] = recipientsArr
-      })
+      if (data.mailtype === MAIL_TYPE_GROUP) {
+        data.user_reg_start_time = 0
+        data.user_reg_end_time = 0xFFFFFFFF
+      }
+      var list = []
+      if (data.recipients != null && data.recipients !== '') {
+        var j = 0
+        data.recipients.split('\n').forEach((item, index) => {
+          if (item != null && item !== '') {
+            list[j] = item
+            j++
+          }
+        })
+      }
+      data.recipients = list
+
+      var arr = []
+      if (data.attachments != null && data.attachments !== '') {
+        j = 0
+        var itemerr = false
+        data.attachments.split('\n').some(item => {
+          var itemArr = item.split(':')
+          if (itemArr[0] != null && itemArr[0] !== '' && itemArr[1] != null && itemArr[1] !== '') {
+            if (!this.checkItem(itemArr[0])) {
+              this.$message({
+                message: 'unknown item id ' + itemArr[0],
+                type: 'error',
+                duration: 2000
+              })
+              itemerr = true
+              return
+            }
+            var recipientsArr = {}
+            recipientsArr['itemid'] = parseInt(itemArr[0])
+            recipientsArr['itemnum'] = parseInt(itemArr[1])
+            arr[j] = recipientsArr
+            j++
+          }
+        })
+
+        if (itemerr) {
+          return
+        }
+      }
       data.attachments = arr
       this.$refs['postForm'].validate((valid) => {
         if (valid) {
@@ -236,6 +325,16 @@ export default {
           })
         }
       })
+    },
+    checkItem(itemid) {
+      var found = false
+      ItemList.some(item => {
+        if (item === itemid) {
+          found = true
+          return true
+        }
+      })
+      return found
     }
   }
 }