diff --git a/app/models/mail_handler.rb b/app/models/mail_handler.rb
index dccf05d..057a343 100644
--- a/app/models/mail_handler.rb
+++ b/app/models/mail_handler.rb
@@ -359,12 +359,21 @@ class MailHandler < ActionMailer::Base
   def plain_text_body
     return @plain_text_body unless @plain_text_body.nil?
 
-    part = email.text_part || email.html_part || email
-    @plain_text_body = Redmine::CodesetUtil.to_utf8(part.body.decoded, part.charset)
+    parts = if (text_parts = email.all_parts.select {|p| p.mime_type == 'text/plain'}).present?
+              text_parts
+            elsif (html_parts = email.all_parts.select {|p| p.mime_type == 'text/html'}).present?
+              html_parts
+            else
+              [email]
+            end
+    @plain_text_body = parts.map {|p| Redmine::CodesetUtil.to_utf8(p.body.decoded, p.charset)}.join("\r\n")
 
     # strip html tags and remove doctype directive
-    @plain_text_body = strip_tags(@plain_text_body.strip)
-    @plain_text_body.sub! %r{^<!DOCTYPE .*$}, ''
+    if parts.any? {|p| p.mime_type == 'text/html'}
+      @plain_text_body = strip_tags(@plain_text_body.strip)
+      @plain_text_body.sub! %r{^<!DOCTYPE .*$}, ''
+    end
+
     @plain_text_body
   end
 
diff --git a/test/unit/mail_handler_test.rb b/test/unit/mail_handler_test.rb
index 92d007c..4a15306 100644
--- a/test/unit/mail_handler_test.rb
+++ b/test/unit/mail_handler_test.rb
@@ -778,6 +778,11 @@ class MailHandlerTest < ActiveSupport::TestCase
     assert_equal str2, user.lastname
   end
 
+  def test_multiple_text_parts
+    issue = submit_email('multiple_text_parts.eml', :issue => {:project => 'ecookbook'})
+    assert_match /first.*second.*third/m, issue.description
+  end
+
   private
 
   def submit_email(filename, options={})