In destination group is invalid, use the oldest valid group. Also notice in admin interface in email account config about invalid groups.

app/assets/javascripts/app/controllers/_channel/email.coffee

@@ -222,13 +222,13 @@ class App.ChannelEmailAccountOverview extends App.Controller
   events:
     'click .js-channelNew': 'wizard'
     'click .js-channelDelete': 'delete'
-    'click .js-channelGroupChange': 'group_change'
-    'click .js-editInbound': 'edit_inbound'
-    'click .js-editOutbound': 'edit_outbound'
-    'click .js-emailAddressNew': 'email_address_new'
-    'click .js-emailAddressEdit': 'email_address_edit'
-    'click .js-emailAddressDelete': 'email_address_delete',
-    'click .js-editNotificationOutbound': 'edit_notification_outbound'
+    'click .js-channelGroupChange': 'groupChange'
+    'click .js-editInbound': 'editInbound'
+    'click .js-editOutbound': 'editOutbound'
+    'click .js-emailAddressNew': 'emailAddressNew'
+    'click .js-emailAddressEdit': 'emailAddressEdit'
+    'click .js-emailAddressDelete': 'emailAddressDelete',
+    'click .js-editNotificationOutbound': 'editNotificationOutbound'
 
   constructor: ->
     super
@@ -259,7 +259,7 @@ class App.ChannelEmailAccountOverview extends App.Controller
     for channel_id in data.account_channel_ids
       account_channel = App.Channel.fullLocal(channel_id)
       if account_channel.group_id
-        account_channel.group = App.Group.find(account_channel.group_id).displayName()
+        account_channel.group = App.Group.find(account_channel.group_id)
       else
         account_channel.group = '-'
       account_channels.push account_channel
@@ -294,7 +294,7 @@ class App.ChannelEmailAccountOverview extends App.Controller
       channelDriver: @channelDriver
     )
 
-  edit_inbound: (e) =>
+  editInbound: (e) =>
     e.preventDefault()
     id      = $(e.target).closest('.action').data('id')
     channel = App.Channel.find(id)
@@ -307,7 +307,7 @@ class App.ChannelEmailAccountOverview extends App.Controller
       channelDriver: @channelDriver
     )
 
-  edit_outbound: (e) =>
+  editOutbound: (e) =>
     e.preventDefault()
     id      = $(e.target).closest('.action').data('id')
     channel = App.Channel.find(id)
@@ -330,7 +330,7 @@ class App.ChannelEmailAccountOverview extends App.Controller
       callback:  @load
     )
 
-  group_change: (e) =>
+  groupChange: (e) =>
     e.preventDefault()
     id   = $(e.target).closest('.action').data('id')
     item = App.Channel.find(id)
@@ -340,7 +340,7 @@ class App.ChannelEmailAccountOverview extends App.Controller
       callback: @load
     )
 
-  email_address_new: (e) =>
+  emailAddressNew: (e) =>
     e.preventDefault()
     channel_id = $(e.target).closest('.action').data('id')
     new App.ControllerGenericNew(
@@ -353,7 +353,7 @@ class App.ChannelEmailAccountOverview extends App.Controller
       callback: @load
     )
 
-  email_address_edit: (e) =>
+  emailAddressEdit: (e) =>
     e.preventDefault()
     id = $(e.target).closest('li').data('id')
     new App.ControllerGenericEdit(
@@ -365,7 +365,7 @@ class App.ChannelEmailAccountOverview extends App.Controller
       callback: @load
     )
 
-  email_address_delete: (e) =>
+  emailAddressDelete: (e) =>
     e.preventDefault()
     id = $(e.target).closest('li').data('id')
     item = App.EmailAddress.find(id)
@@ -375,7 +375,7 @@ class App.ChannelEmailAccountOverview extends App.Controller
       callback: @load
     )
 
-  edit_notification_outbound: (e) =>
+  editNotificationOutbound: (e) =>
     e.preventDefault()
     id      = $(e.target).closest('.action').data('id')
     channel = App.Channel.find(id)
@@ -395,7 +395,7 @@ class App.ChannelEmailEdit extends App.ControllerModal
 
   content: =>
     configureAttributesBase = [
-      { name: 'group_id', display: 'Destination Group', tag: 'select', null: false, relation: 'Group', nulloption: true },
+      { name: 'group_id', display: 'Destination Group', tag: 'select', null: false, relation: 'Group', nulloption: true, filter: { active: true } },
     ]
     @form = new App.ControllerForm(
       model:

app/assets/javascripts/app/views/channel/email_account_overview.jst.eco

@@ -72,7 +72,19 @@
         <hr>
 
         <h3><%- @T('Destination Group') %></h3>
-        <a href="#" class="js-channelGroupChange"><%= channel.group %></a>
+        <a href="#" class="js-channelGroupChange <% if channel.group.active is false: %>alert alert--danger<% end %>">
+          <% groupName = '' %>
+          <% if channel.group.displayName: %>
+            <% groupName = channel.group.displayName() %>
+          <% else: %>
+            <% groupName = channel.group %>
+          <% end %>
+          <% if channel.group.active is false: %>
+            <%- @T('%s is inactive, please select a active one.', groupName) %>
+          <% else: %>
+            <%= groupName %>
+          <% end %>
+        </a>
       </div>
       <div class="action-block action-block--flex">
         <div class="horizontal">

app/models/channel/email_parser.rb

@@ -427,8 +427,19 @@ retrns
           }
         end
 
+        # get default group where ticket is created
+        group = nil
+        if channel[:group_id]
+          group = Group.lookup(id: channel[:group_id])
+        end
+        if !group || group && !group.active
+          group = Group.where(active: true).order('id ASC').first
+        end
+        if !group
+          group = Group.first
+        end
         ticket = Ticket.new(
-          group_id: channel[:group_id] || 1,
+          group_id: group.id,
           customer_id: user.id,
           title: mail[:subject] || '',
           state_id: Ticket::State.find_by(name: 'new').id,

test/unit/email_process_test.rb

@@ -11,7 +11,9 @@ To: customer@example.com
 Subject: some subject
 
 Some Text',
+        channel: {
           trusted: false,
+        },
         success: true,
       },
       {
@@ -20,7 +22,9 @@ To: customer@example.com
 Subject: äöü some subject
 
 Some Textäöü",
+        channel: {
           trusted: false,
+        },
         success: true,
         result: {
           0 => {
@@ -116,7 +120,9 @@ Subject: Subject: =?utf-8?B?44CQ5LiT5Lia5Li65oKo5rOo5YaM6aaZ5riv5Y+K5rW35aSW5YWs
         =?utf-8?B?5YWs5Y+46Zmi5aOr5bel5L2c56uZ5pel5YmN5q2j5byP5bu6Li4uW+ivpue7hl0=?=
 
 Some Text",
+        channel: {
           trusted: false,
+        },
         success: true,
         result: {
           0 => {
@@ -1834,7 +1840,9 @@ Cc: any@example.com
 Subject: some subject
 
 Some Text',
+        channel: {
           trusted: false,
+        },
         success: true,
         result: {
           0 => {
@@ -1989,7 +1997,9 @@ Subject: some subject
 X-Zammad-Ignore: true
 
 Some Text',
+        channel: {
           trusted: true,
+        },
         success: false,
       },
       {
@@ -2003,7 +2013,9 @@ x-Zammad-Article-type: phone
 x-Zammad-Article-Internal: true
 
 Some Text',
+        channel: {
           trusted: true,
+        },
         success: true,
         result: {
           0 => {
@@ -2035,7 +2047,9 @@ x-Zammad-Article-Type: phone
 x-Zammad-Article-Internal: true
 
 Some Text',
+        channel: {
           trusted: false,
+        },
         success: true,
         result: {
           0 => {
@@ -2054,9 +2068,86 @@ Some Text',
     process(files)
   end
 
+  test 'process inactive group - a' do
+    group3 = Group.create_if_not_exists(
+      name: 'Test Group Inactive',
+      active: false,
+      created_by_id: 1,
+      updated_by_id: 1,
+    )
+    files = [
+      {
+        data: 'From: me@example.com
+To: customer@example.com
+Subject: some subject
+
+Some Text',
+        channel: {
+          group_id: group3.id,
+        },
+        success: true,
+        result: {
+          0 => {
+            state: 'new',
+            group: 'Users',
+            priority: '2 normal',
+            title: 'some subject',
+          },
+          1 => {
+            sender: 'Customer',
+            type: 'email',
+            internal: false,
+          },
+        },
+      },
+    ]
+    process(files)
+  end
+
+  test 'process inactive group - b' do
+    group_active_map = {}
+    Group.all.each {|group|
+      group_active_map[group.id] = group.active
+      group.active = false
+      group.save
+    }
+    files = [
+      {
+        data: 'From: me@example.com
+To: customer@example.com
+Subject: some subject
+
+Some Text',
+        channel: {},
+        success: true,
+        result: {
+          0 => {
+            state: 'new',
+            group: 'Users',
+            priority: '2 normal',
+            title: 'some subject',
+          },
+          1 => {
+            sender: 'Customer',
+            type: 'email',
+            internal: false,
+          },
+        },
+      },
+    ]
+    process(files)
+
+    group_active_map = {}
+    Group.all.each {|group|
+      next if !group_active_map.key?(group.id)
+      group.active = group_active_map[group.id]
+      group.save
+    }
+  end
+
   def process(files)
     files.each { |file|
-      result = Channel::EmailParser.new.process( { trusted: file[:trusted] }, file[:data] )
+      result = Channel::EmailParser.new.process(file[:channel]||{}, file[:data])
       if file[:success]
         if result && result.class == Array && result[1]
           assert( true )