diff --git a/apps/assets/backends/db.py b/apps/assets/backends/db.py
index aa3e1ef78..0e5d288b9 100644
--- a/apps/assets/backends/db.py
+++ b/apps/assets/backends/db.py
@@ -4,6 +4,7 @@ from django.utils.translation import ugettext as _
 from functools import reduce
 from django.db.models import F, CharField, Value, IntegerField, Q, Count
 from django.db.models.functions import Concat
+from rest_framework.exceptions import PermissionDenied
 
 from common.utils import get_object_or_none
 from orgs.utils import current_org
@@ -250,7 +251,7 @@ class AdminUserBackend(DBBackend):
         )
 
     def _perform_delete_by_union_id(self, union_id_cleaned):
-        raise PermissionError(_("Could not remove asset admin user"))
+        raise PermissionDenied(_("Could not remove asset admin user"))
 
     def all(self):
         qs = self.model.objects.all().annotate(
@@ -314,7 +315,7 @@ class AuthbookBackend(DBBackend):
         authbook_id, asset_id = union_id_cleaned
         authbook = get_object_or_none(AuthBook, pk=authbook_id)
         if authbook.is_latest:
-            raise PermissionError(_("Latest version could not be delete"))
+            raise PermissionDenied(_("Latest version could not be delete"))
         AuthBook.objects.filter(id=authbook_id).delete()
 
     def all(self):
diff --git a/apps/assets/models/authbook.py b/apps/assets/models/authbook.py
index 35b7e3894..3a17df7b7 100644
--- a/apps/assets/models/authbook.py
+++ b/apps/assets/models/authbook.py
@@ -4,6 +4,7 @@
 from django.db import models, transaction
 from django.db.models import Max
 from django.utils.translation import ugettext_lazy as _
+from rest_framework.exceptions import PermissionDenied
 
 from orgs.mixins.models import OrgManager
 from .base import BaseUser
@@ -14,7 +15,7 @@ __all__ = ['AuthBook']
 class AuthBookQuerySet(models.QuerySet):
     def delete(self):
         if self.count() > 1:
-            raise PermissionError(_("Bulk delete deny"))
+            raise PermissionDenied(_("Bulk delete deny"))
         return super().delete()
 
 
diff --git a/apps/locale/zh/LC_MESSAGES/django.mo b/apps/locale/zh/LC_MESSAGES/django.mo
index f1e5b13b4..c34d92992 100644
Binary files a/apps/locale/zh/LC_MESSAGES/django.mo and b/apps/locale/zh/LC_MESSAGES/django.mo differ
diff --git a/apps/locale/zh/LC_MESSAGES/django.po b/apps/locale/zh/LC_MESSAGES/django.po
index 0acdf61d9..0df73a8ea 100644
--- a/apps/locale/zh/LC_MESSAGES/django.po
+++ b/apps/locale/zh/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: JumpServer 0.3.3\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2021-06-11 11:06+0800\n"
+"POT-Creation-Date: 2021-06-16 17:47+0800\n"
 "PO-Revision-Date: 2021-05-20 10:54+0800\n"
 "Last-Translator: ibuler <ibuler@qq.com>\n"
 "Language-Team: JumpServer team<ibuler@qq.com>\n"
@@ -119,7 +119,7 @@ msgstr "系统用户"
 
 #: acls/models/login_asset_acl.py:22
 #: applications/serializers/attrs/application_category/remote_app.py:33
-#: assets/models/asset.py:355 assets/models/authbook.py:26
+#: assets/models/asset.py:355 assets/models/authbook.py:27
 #: assets/models/gathered_user.py:14 assets/serializers/admin_user.py:34
 #: assets/serializers/asset_user.py:48 assets/serializers/asset_user.py:91
 #: assets/serializers/system_user.py:202 audits/models.py:38
@@ -184,7 +184,7 @@ msgstr "格式为逗号分隔的字符串, * 表示匹配所有. "
 #: users/templates/users/_select_user_modal.html:14
 #: xpack/plugins/change_auth_plan/models.py:47
 #: xpack/plugins/change_auth_plan/models.py:278
-#: xpack/plugins/cloud/serializers.py:65
+#: xpack/plugins/cloud/serializers.py:51
 msgid "Username"
 msgstr "用户名"
 
@@ -233,7 +233,7 @@ msgstr "所有复核人都不属于组织 `{}`"
 #: applications/const.py:9
 #: applications/serializers/attrs/application_category/db.py:14
 #: applications/serializers/attrs/application_type/mysql_workbench.py:26
-#: assets/backends/db.py:278
+#: assets/backends/db.py:279
 msgid "Database"
 msgstr "数据库"
 
@@ -304,7 +304,7 @@ msgid "Cluster"
 msgstr "集群"
 
 #: applications/serializers/attrs/application_category/db.py:11
-#: ops/models/adhoc.py:146 xpack/plugins/cloud/serializers.py:63
+#: ops/models/adhoc.py:146 xpack/plugins/cloud/serializers.py:49
 msgid "Host"
 msgstr "主机"
 
@@ -314,7 +314,7 @@ msgstr "主机"
 #: applications/serializers/attrs/application_type/oracle.py:11
 #: applications/serializers/attrs/application_type/pgsql.py:11
 #: assets/models/asset.py:188 assets/models/domain.py:53
-#: xpack/plugins/cloud/serializers.py:64
+#: xpack/plugins/cloud/serializers.py:50
 msgid "Port"
 msgstr "端口"
 
@@ -344,7 +344,7 @@ msgstr "目标URL"
 #: xpack/plugins/change_auth_plan/models.py:68
 #: xpack/plugins/change_auth_plan/models.py:190
 #: xpack/plugins/change_auth_plan/models.py:285
-#: xpack/plugins/cloud/serializers.py:67
+#: xpack/plugins/cloud/serializers.py:53
 msgid "Password"
 msgstr "密码"
 
@@ -376,7 +376,7 @@ msgstr "不能删除根节点 ({})"
 msgid "Deletion failed and the node contains assets"
 msgstr "删除失败，节点包含资产"
 
-#: assets/backends/db.py:109 assets/models/user.py:304 audits/models.py:39
+#: assets/backends/db.py:110 assets/models/user.py:304 audits/models.py:39
 #: perms/models/application_permission.py:31
 #: perms/models/asset_permission.py:101 templates/_nav.html:45
 #: terminal/backends/command/models.py:20
@@ -390,21 +390,21 @@ msgstr "删除失败，节点包含资产"
 msgid "System user"
 msgstr "系统用户"
 
-#: assets/backends/db.py:180
+#: assets/backends/db.py:181
 msgid "System user(Dynamic)"
 msgstr "系统用户(动态)"
 
-#: assets/backends/db.py:232 assets/models/asset.py:196
+#: assets/backends/db.py:233 assets/models/asset.py:196
 #: assets/models/cluster.py:19 assets/models/user.py:67 templates/_nav.html:44
-#: xpack/plugins/cloud/models.py:92 xpack/plugins/cloud/serializers.py:160
+#: xpack/plugins/cloud/models.py:92 xpack/plugins/cloud/serializers.py:146
 msgid "Admin user"
 msgstr "管理用户"
 
-#: assets/backends/db.py:253
+#: assets/backends/db.py:254
 msgid "Could not remove asset admin user"
 msgstr "不能移除资产的管理用户账号"
 
-#: assets/backends/db.py:317
+#: assets/backends/db.py:318
 msgid "Latest version could not be delete"
 msgstr "最新版本的不能被删除"
 
@@ -538,19 +538,19 @@ msgstr "创建者"
 msgid "Date created"
 msgstr "创建日期"
 
-#: assets/models/authbook.py:17
+#: assets/models/authbook.py:18
 msgid "Bulk delete deny"
 msgstr "拒绝批量删除"
 
-#: assets/models/authbook.py:27
+#: assets/models/authbook.py:28
 msgid "Latest version"
 msgstr "最新版本"
 
-#: assets/models/authbook.py:28
+#: assets/models/authbook.py:29
 msgid "Version"
 msgstr "版本"
 
-#: assets/models/authbook.py:37
+#: assets/models/authbook.py:38
 msgid "AuthBook"
 msgstr ""
 
@@ -715,7 +715,7 @@ msgstr "ssh私钥"
 #: users/templates/users/user_asset_permission.html:41
 #: users/templates/users/user_asset_permission.html:73
 #: users/templates/users/user_asset_permission.html:158
-#: xpack/plugins/cloud/models.py:89 xpack/plugins/cloud/serializers.py:161
+#: xpack/plugins/cloud/models.py:89 xpack/plugins/cloud/serializers.py:147
 msgid "Node"
 msgstr "节点"
 
@@ -1227,17 +1227,25 @@ msgid "SSO"
 msgstr ""
 
 #: audits/signals_handler.py:60
+msgid "Auth Token"
+msgstr "认证令牌"
+
+#: audits/signals_handler.py:61
 #: authentication/templates/authentication/login.html:210
 #: notifications/backends/__init__.py:12
 msgid "WeCom"
 msgstr "企业微信"
 
-#: audits/signals_handler.py:61
+#: audits/signals_handler.py:62
 #: authentication/templates/authentication/login.html:215
 #: notifications/backends/__init__.py:13
 msgid "DingTalk"
 msgstr "钉钉"
 
+#: authentication/api/connection_token.py:249
+msgid "Invalid token"
+msgstr "无效的令牌"
+
 #: authentication/api/mfa.py:60
 msgid "Code is invalid"
 msgstr "Code无效"
@@ -1715,7 +1723,7 @@ msgstr "对象"
 msgid "The file content overflowed (The maximum length `{}` bytes)"
 msgstr "文件内容太大 (最大长度 `{}` 字节)"
 
-#: common/drf/parsers/base.py:148
+#: common/drf/parsers/base.py:153
 msgid "Parse file error: {}"
 msgstr "解析文件错误: {}"
 
@@ -1846,7 +1854,7 @@ msgstr "邮件"
 
 #: notifications/backends/__init__.py:14
 msgid "Site message"
-msgstr ""
+msgstr "站内信"
 
 #: ops/api/celery.py:61 ops/api/celery.py:76
 msgid "Waiting task start"
@@ -1993,7 +2001,7 @@ msgstr "任务结束"
 
 #: ops/notifications.py:13
 msgid "Server performance"
-msgstr ""
+msgstr "监控告警"
 
 #: ops/notifications.py:20
 msgid "Disk used more than 80%: {} => {}"
@@ -2535,100 +2543,100 @@ msgstr "启用企业微信认证"
 msgid "Enable DingTalk Auth"
 msgstr "启用钉钉认证"
 
-#: settings/utils/ldap.py:411
+#: settings/utils/ldap.py:417
 msgid "Host or port is disconnected: {}"
 msgstr "主机或端口不可连接: {}"
 
-#: settings/utils/ldap.py:413
+#: settings/utils/ldap.py:419
 msgid "The port is not the port of the LDAP service: {}"
 msgstr "端口不是LDAP服务端口: {}"
 
-#: settings/utils/ldap.py:415
+#: settings/utils/ldap.py:421
 msgid "Please add certificate: {}"
 msgstr "请添加证书"
 
-#: settings/utils/ldap.py:417 settings/utils/ldap.py:444
-#: settings/utils/ldap.py:474 settings/utils/ldap.py:502
+#: settings/utils/ldap.py:423 settings/utils/ldap.py:450
+#: settings/utils/ldap.py:480 settings/utils/ldap.py:508
 msgid "Unknown error: {}"
 msgstr "未知错误: {}"
 
-#: settings/utils/ldap.py:431
+#: settings/utils/ldap.py:437
 msgid "Bind DN or Password incorrect"
 msgstr "绑定DN或密码错误"
 
-#: settings/utils/ldap.py:438
+#: settings/utils/ldap.py:444
 msgid "Please enter Bind DN: {}"
 msgstr "请输入绑定DN: {}"
 
-#: settings/utils/ldap.py:440
+#: settings/utils/ldap.py:446
 msgid "Please enter Password: {}"
 msgstr "请输入密码: {}"
 
-#: settings/utils/ldap.py:442
+#: settings/utils/ldap.py:448
 msgid "Please enter correct Bind DN and Password: {}"
 msgstr "请输入正确的绑定DN和密码: {}"
 
-#: settings/utils/ldap.py:460
+#: settings/utils/ldap.py:466
 msgid "Invalid User OU or User search filter: {}"
 msgstr "不合法的用户OU或用户过滤器: {}"
 
-#: settings/utils/ldap.py:491
+#: settings/utils/ldap.py:497
 msgid "LDAP User attr map not include: {}"
 msgstr "LDAP属性映射没有包含: {}"
 
-#: settings/utils/ldap.py:498
+#: settings/utils/ldap.py:504
 msgid "LDAP User attr map is not dict"
 msgstr "LDAP属性映射不合法"
 
-#: settings/utils/ldap.py:517
+#: settings/utils/ldap.py:523
 msgid "LDAP authentication is not enabled"
 msgstr "LDAP认证没有启用"
 
-#: settings/utils/ldap.py:535
+#: settings/utils/ldap.py:541
 msgid "Error (Invalid LDAP server): {}"
 msgstr "错误 （不合法的LDAP服务器地址）: {}"
 
-#: settings/utils/ldap.py:537
+#: settings/utils/ldap.py:543
 msgid "Error (Invalid Bind DN): {}"
 msgstr "错误（不合法的绑定DN）: {}"
 
-#: settings/utils/ldap.py:539
+#: settings/utils/ldap.py:545
 msgid "Error (Invalid LDAP User attr map): {}"
 msgstr "错误（不合法的LDAP属性映射）: {}"
 
-#: settings/utils/ldap.py:541
+#: settings/utils/ldap.py:547
 msgid "Error (Invalid User OU or User search filter): {}"
 msgstr "错误（不合法的用户OU或用户过滤器）: {}"
 
-#: settings/utils/ldap.py:543
+#: settings/utils/ldap.py:549
 msgid "Error (Not enabled LDAP authentication): {}"
 msgstr "错误（没有启用LDAP认证）: {}"
 
-#: settings/utils/ldap.py:545
+#: settings/utils/ldap.py:551
 msgid "Error (Unknown): {}"
 msgstr "错误（未知）: {}"
 
-#: settings/utils/ldap.py:548
+#: settings/utils/ldap.py:554
 msgid "Succeed: Match {} s user"
 msgstr "成功匹配 {} 个用户"
 
-#: settings/utils/ldap.py:581
+#: settings/utils/ldap.py:587
 msgid "Authentication failed (configuration incorrect): {}"
 msgstr "认证失败（配置错误）: {}"
 
-#: settings/utils/ldap.py:583
+#: settings/utils/ldap.py:589
 msgid "Authentication failed (before login check failed): {}"
 msgstr "认证失败（登录前检查失败）: {}"
 
-#: settings/utils/ldap.py:585
+#: settings/utils/ldap.py:591
 msgid "Authentication failed (username or password incorrect): {}"
 msgstr "认证失败 (用户名或密码不正确): {}"
 
-#: settings/utils/ldap.py:587
+#: settings/utils/ldap.py:593
 msgid "Authentication failed (Unknown): {}"
 msgstr "认证失败: (未知): {}"
 
-#: settings/utils/ldap.py:590
+#: settings/utils/ldap.py:596
 msgid "Authentication success: {}"
 msgstr "认证成功: {}"
 
@@ -2817,7 +2825,7 @@ msgstr "数据库应用"
 msgid "Perms"
 msgstr "权限管理"
 
-#: templates/_nav.html:97
+#: templates/_nav.html:97 terminal/notifications.py:15
 msgid "Sessions"
 msgstr "会话管理"
 
@@ -2841,7 +2849,7 @@ msgstr "Web终端"
 msgid "File manager"
 msgstr "文件管理"
 
-#: templates/_nav.html:110 terminal/apps.py:9 terminal/notifications.py:15
+#: templates/_nav.html:110 terminal/apps.py:9
 #: terminal/serializers/session.py:40
 msgid "Terminal"
 msgstr "终端"
@@ -3273,8 +3281,8 @@ msgid "Replay storage"
 msgstr "录像存储"
 
 #: terminal/notifications.py:35
-msgid "Terminal command alert"
-msgstr "终端命令告警"
+msgid "Danger command alert"
+msgstr "危险命令告警"
 
 #: terminal/notifications.py:44
 #, python-format
@@ -3314,14 +3322,13 @@ msgid ""
 msgstr "危险命令告警: [%(name)s->%(login_from)s@%(remote_addr)s] $%(command)s"
 
 #: terminal/notifications.py:97
-msgid "Batch command alert"
-msgstr "批量命令告警"
+msgid "Batch danger command alert"
+msgstr "批量危险命令告警"
 
 #: terminal/notifications.py:108
 #, python-format
 msgid ""
 "\n"
-"                            <br>\n"
 "                            Assets: %(assets)s\n"
 "                            <br>\n"
 "                            User: %(user)s\n"
@@ -3337,7 +3344,6 @@ msgid ""
 "                            "
 msgstr ""
 "\n"
-"        <br>\n"
 "        资产: %(assets)s\n"
 "        <br>\n"
 "        用户: %(user)s\n"
@@ -3350,10 +3356,10 @@ msgstr ""
 "        ----------------- 命令 ---------------- <br>\n"
 "        "
 
-#: terminal/notifications.py:134
+#: terminal/notifications.py:133
 #, python-format
 msgid "Insecure Web Command Execution Alert: [%(name)s]"
-msgstr "Web页面-> 命令执行 告警: [%(name)s]"
+msgstr "批量危险命令告警: [%(name)s]"
 
 #: terminal/serializers/session.py:33
 msgid "User ID"
@@ -4051,7 +4057,7 @@ msgid "Security token validation"
 msgstr "安全令牌验证"
 
 #: users/templates/users/_base_otp.html:14 xpack/plugins/cloud/models.py:78
-#: xpack/plugins/cloud/serializers.py:159
+#: xpack/plugins/cloud/serializers.py:145
 msgid "Account"
 msgstr "账户"
 
@@ -4792,7 +4798,7 @@ msgstr "云服务商"
 msgid "Cloud account"
 msgstr "云账号"
 
-#: xpack/plugins/cloud/models.py:81 xpack/plugins/cloud/serializers.py:140
+#: xpack/plugins/cloud/models.py:81 xpack/plugins/cloud/serializers.py:126
 msgid "Regions"
 msgstr "地域"
 
@@ -4800,7 +4806,7 @@ msgstr "地域"
 msgid "Hostname strategy"
 msgstr "主机名策略"
 
-#: xpack/plugins/cloud/models.py:95 xpack/plugins/cloud/serializers.py:163
+#: xpack/plugins/cloud/models.py:95 xpack/plugins/cloud/serializers.py:149
 msgid "Always update"
 msgstr "总是更新"
 
@@ -4992,24 +4998,20 @@ msgstr ""
 msgid "Subscription ID"
 msgstr ""
 
-#: xpack/plugins/cloud/serializers.py:49
-msgid "This field is required"
-msgstr "这个字段是必填项"
-
-#: xpack/plugins/cloud/serializers.py:138
+#: xpack/plugins/cloud/serializers.py:124
 msgid "History count"
 msgstr "执行次数"
 
-#: xpack/plugins/cloud/serializers.py:139
+#: xpack/plugins/cloud/serializers.py:125
 msgid "Instance count"
 msgstr "实例个数"
 
-#: xpack/plugins/cloud/serializers.py:162
+#: xpack/plugins/cloud/serializers.py:148
 #: xpack/plugins/gathered_user/serializers.py:20
 msgid "Periodic display"
 msgstr "定时执行"
 
-#: xpack/plugins/cloud/utils.py:65
+#: xpack/plugins/cloud/utils.py:64
 msgid "Account unavailable"
 msgstr "账户无效"
 
@@ -5096,3 +5098,9 @@ msgstr "旗舰版"
 #: xpack/plugins/license/models.py:77
 msgid "Community edition"
 msgstr "社区版"
+
+#~ msgid "This field is required"
+#~ msgstr "这个字段是必填项"
+
+#~ msgid "Terminal command alert"
+#~ msgstr "终端命令告警"
diff --git a/apps/notifications/notifications.py b/apps/notifications/notifications.py
index 8563fd214..4c4db11d9 100644
--- a/apps/notifications/notifications.py
+++ b/apps/notifications/notifications.py
@@ -108,11 +108,7 @@ class Message(metaclass=MessageType):
         }
 
     def get_site_msg_msg(self) -> dict:
-        msg = self.get_common_msg()
-        return {
-            'subject': msg,
-            'message': msg
-        }
+        return self.get_email_msg()
 
 
 class SystemMessage(Message):
diff --git a/apps/terminal/api/command.py b/apps/terminal/api/command.py
index b43910e26..9e3065e99 100644
--- a/apps/terminal/api/command.py
+++ b/apps/terminal/api/command.py
@@ -204,8 +204,6 @@ class InsecureCommandAlertAPI(generics.CreateAPIView):
         serializer.is_valid(raise_exception=True)
         commands = serializer.validated_data
         for command in commands:
-            if command['risk_level'] >= settings.SECURITY_INSECURE_COMMAND_LEVEL and \
-                    settings.SECURITY_INSECURE_COMMAND and \
-                    settings.SECURITY_INSECURE_COMMAND_EMAIL_RECEIVER:
+            if command['risk_level'] >= settings.SECURITY_INSECURE_COMMAND_LEVEL:
                 CommandAlertMessage(command).publish_async()
         return Response()
diff --git a/apps/terminal/notifications.py b/apps/terminal/notifications.py
index eac9c2f7d..088e8ecc0 100644
--- a/apps/terminal/notifications.py
+++ b/apps/terminal/notifications.py
@@ -6,33 +6,46 @@ from common.utils import get_logger, reverse
 from notifications.notifications import SystemMessage
 from terminal.models import Session, Command
 from notifications.models import SystemMsgSubscription
+from notifications.backends import BACKEND
 
 logger = get_logger(__name__)
 
 __all__ = ('CommandAlertMessage', 'CommandExecutionAlert')
 
 CATEGORY = 'terminal'
-CATEGORY_LABEL = _('Terminal')
+CATEGORY_LABEL = _('Sessions')
 
 
 class CommandAlertMixin:
+    def get_dingtalk_msg(self) -> str:
+        msg = self._get_message()
+        msg = msg.replace('<br>', '')
+        return msg
+
     @classmethod
     def post_insert_to_db(cls, subscription: SystemMsgSubscription):
         """
-        兼容操作，试图用 `settings.SECURITY_INSECURE_COMMAND_EMAIL_RECEIVER` 的邮件地址找到
+        兼容操作，试图用 `settings.SECURITY_INSECURE_COMMAND_EMAIL_RECEIVER` 的邮件地址assets_systemuser_assets找到
         用户，把用户设置为默认接收者
         """
-        emails = settings.SECURITY_INSECURE_COMMAND_EMAIL_RECEIVER.split(',')
-        emails = [email.strip() for email in emails]
+        from settings.models import Setting
+        db_setting = Setting.objects.filter(name='SECURITY_INSECURE_COMMAND_EMAIL_RECEIVER').first()
+        if db_setting:
+            emails = db_setting.value
+        emails = emails or settings.SECURITY_INSECURE_COMMAND_EMAIL_RECEIVER
+        emails = emails.split(',')
+        emails = [email.strip().strip('"') for email in emails]
 
         users = User.objects.filter(email__in=emails)
         subscription.users.add(*users)
+        subscription.receive_backends = [BACKEND.EMAIL]
+        subscription.save()
 
 
 class CommandAlertMessage(CommandAlertMixin, SystemMessage):
     category = CATEGORY
     category_label = CATEGORY_LABEL
-    message_type_label = _('Terminal command alert')
+    message_type_label = _('Danger command alert')
 
     def __init__(self, command):
         self.command = command
@@ -94,7 +107,7 @@ class CommandAlertMessage(CommandAlertMixin, SystemMessage):
 class CommandExecutionAlert(CommandAlertMixin, SystemMessage):
     category = CATEGORY
     category_label = CATEGORY_LABEL
-    message_type_label = _('Batch command alert')
+    message_type_label = _('Batch danger command alert')
 
     def __init__(self, command):
         self.command = command
@@ -106,7 +119,6 @@ class CommandExecutionAlert(CommandAlertMixin, SystemMessage):
 
         assets = ', '.join([str(asset) for asset in command['assets']])
         message = _("""
-                            <br>
                             Assets: %(assets)s
                             <br>
                             User: %(user)s