Adds a X-Redmine-Sender header to email notifications (#5643).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8785 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/mailer.rb

@@ -41,6 +41,7 @@ class Mailer < ActionMailer::Base
                     'Issue-Author' => issue.author.login
     redmine_headers 'Issue-Assignee' => issue.assigned_to.login if issue.assigned_to
     message_id issue
+    @author = issue.author
     recipients issue.recipients
     cc(issue.watcher_recipients - @recipients)
     subject "[#{issue.project.name} - #{issue.tracker.name} ##{issue.id}] (#{issue.status.name}) #{issue.subject}"
@@ -394,6 +395,10 @@ class Mailer < ActionMailer::Base
       cc.delete(@author.mail) if cc
     end
 
+    if @author.logged?
+      redmine_headers 'Sender' => @author.login
+    end
+
     notified_users = [recipients, cc].flatten.compact.uniq
     # Rails would log recipients only, not cc and bcc
     mylogger.info "Sending email notification to: #{notified_users.join(', ')}" if mylogger