diff --git a/app/models/mail_handler.rb b/app/models/mail_handler.rb
index de1febe..aa37653 100644
--- a/app/models/mail_handler.rb
+++ b/app/models/mail_handler.rb
@@ -362,11 +362,27 @@ class MailHandler < ActionMailer::Base
     keyword
   end
 
+  def get_project_from_receiver_addresses
+    [:to, :cc, :bcc].each do |field|
+      header = @email[field]
+      next if header.blank? || header.field.blank? || !header.field.respond_to?(:addrs)
+      header.field.addrs.each do |addr|
+        if addr.local.to_s =~ /\+([^+]+)\z/
+          if project = Project.find_by_identifier($1)
+            return project
+          end
+        end
+      end
+    end
+    nil
+  end
+
   def target_project
     # TODO: other ways to specify project:
     # * parse the email To field
     # * specific project (eg. Setting.mail_handler_target_project)
-    target = Project.find_by_identifier(get_keyword(:project))
+    target = get_project_from_receiver_addresses
+    target ||= Project.find_by_identifier(get_keyword(:project))
     if target.nil?
       # Invalid project keyword, use the project specified as the default one
       default_project = handler_options[:issue][:project]
diff --git a/test/fixtures/mail_handler/ticket_on_project_given_by_to_header.eml b/test/fixtures/mail_handler/ticket_on_project_given_by_to_header.eml
new file mode 100644
index 0000000..5bfeeb1
--- /dev/null
+++ b/test/fixtures/mail_handler/ticket_on_project_given_by_to_header.eml
@@ -0,0 +1,60 @@
+Return-Path: <JSmith@somenet.foo>
+Received: from osiris ([127.0.0.1])
+	by OSIRIS
+	with hMailServer ; Sun, 22 Jun 2008 12:28:07 +0200
+Message-ID: <000501c8d452$a95cd7e0$0a00a8c0@osiris>
+From: "John Smith" <JSmith@somenet.foo>
+To: <redmine+onlinestore@somenet.foo>
+Subject: New ticket on a given project
+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
+X-Priority: 3
+X-MSMail-Priority: Normal
+X-Mailer: Microsoft Outlook Express 6.00.2900.2869
+X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869
+
+Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas imperdiet 
+turpis et odio. Integer eget pede vel dolor euismod varius. Phasellus 
+blandit eleifend augue. Nulla facilisi. Duis id diam. Class aptent taciti 
+sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. In 
+in urna sed tellus aliquet lobortis. Morbi scelerisque tortor in dolor. Cras 
+sagittis odio eu lacus. Aliquam sem tortor, consequat sit amet, vestibulum 
+id, iaculis at, lectus. Fusce tortor libero, congue ut, euismod nec, luctus 
+eget, eros. Pellentesque tortor enim, feugiat in, dignissim eget, tristique 
+sed, mauris --- Pellentesque habitant morbi tristique senectus et netus et 
+malesuada fames ac turpis egestas. Quisque sit amet libero. In hac habitasse 
+platea dictumst.
+
+Status: Resolved
+due date: 2010-12-31
+Start Date:2010-01-01
+Assigned to: John Smith
+fixed version: alpha
+estimated hours: 2.5
+done ratio: 30
+
+--- This line starts with a delimiter and should not be stripped
+
+This paragraph is before delimiters.
+
+BREAK
+
+This paragraph is between delimiters.
+
+---
+
+This paragraph is after the delimiter so it shouldn't appear.
+
+Nulla et nunc. Duis pede. Donec et ipsum. Nam ut dui tincidunt neque 
+sollicitudin iaculis. Duis vitae dolor. Vestibulum eget massa. Sed lorem. 
+Nullam volutpat cursus erat. Cras felis dolor, lacinia quis, rutrum et, 
+dictum et, ligula. Sed erat nibh, gravida in, accumsan non, placerat sed, 
+massa. Sed sodales, ante fermentum ultricies sollicitudin, massa leo 
+pulvinar dui, a gravida orci mi eget odio. Nunc a lacus.
+
+
diff --git a/test/unit/mail_handler_test.rb b/test/unit/mail_handler_test.rb
index 4fc710b..c61dc70 100644
--- a/test/unit/mail_handler_test.rb
+++ b/test/unit/mail_handler_test.rb
@@ -72,6 +72,19 @@ class MailHandlerTest < ActiveSupport::TestCase
     assert mail.subject.include?('New ticket on a given project')
   end
 
+  def test_add_issue_to_project_specified_by_subaddress
+    # This email has redmine+onlinestore@somenet.foo as 'To' header
+    issue = submit_email(
+              'ticket_on_project_given_by_to_header.eml',
+              :issue => {:tracker => 'Support request'}
+            )
+    assert issue.is_a?(Issue)
+    assert !issue.new_record?
+    issue.reload
+    assert_equal 'onlinestore', issue.project.identifier
+    assert_equal 'Support request', issue.tracker.name
+  end
+
   def test_add_issue_with_default_tracker
     # This email contains: 'Project: onlinestore'
     issue = submit_email(