Ignore emails received from the application emission address to avoid hell cycles (#4139).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3022 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/fixtures/mail_handler/ticket_from_emission_address.eml

@@ -0,0 +1,19 @@
+Return-Path: <redmine@somenet.foo>
+Received: from osiris ([127.0.0.1])
+	by OSIRIS
+	with hMailServer ; Sun, 22 Jun 2008 12:28:07 +0200
+Message-ID: <000501c8d452$a95cd7e0$0a00a8c0@osiris>
+From: "John Doe" <Redmine@example.net>
+To: <redmine@somenet.foo>
+Subject: Ticket with the Redmine emission address
+Date: Sun, 22 Jun 2008 12:28:07 +0200
+MIME-Version: 1.0
+Content-Type: text/plain;
+	format=flowed;
+	charset="iso-8859-1";
+	reply-type=original
+Content-Transfer-Encoding: 7bit
+
+This is a ticket submitted with the Redmine emission address.
+It should be ignored.
+

test/unit/mail_handler_test.rb

@@ -185,6 +185,13 @@ class MailHandlerTest < ActiveSupport::TestCase
     assert_equal false, submit_email('ticket_without_from_header.eml')
   end
 
+  def test_should_ignore_emails_from_emission_address
+    Role.anonymous.add_permission!(:add_issues)
+    assert_no_difference 'User.count' do
+      assert_equal false, submit_email('ticket_from_emission_address.eml', :issue => {:project => 'ecookbook'}, :unknown_user => 'create')
+    end
+  end
+
   def test_add_issue_should_send_email_notification
     ActionMailer::Base.deliveries.clear
     # This email contains: 'Project: onlinestore'