From 8ff33ac9f7819ea157f3045a75ea04963504f35d Mon Sep 17 00:00:00 2001
From: Jean-Philippe Lang <jp_lang@yahoo.fr>
Date: Sat, 13 Jul 2013 08:11:20 +0000
Subject: [PATCH] Log email delivery errors (#14403).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12010 e93f8b46-1217-0410-a6f0-8f06a7374b81
---
 app/models/mailer.rb     | 12 +++++++++++-
 test/unit/mailer_test.rb | 23 +++++++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/app/models/mailer.rb b/app/models/mailer.rb
index 5c773c5f1..83dbd9fc6 100644
--- a/app/models/mailer.rb
+++ b/app/models/mailer.rb
@@ -430,7 +430,17 @@ class Mailer < ActionMailer::Base
 
   def self.deliver_mail(mail)
     return false if mail.to.blank? && mail.cc.blank? && mail.bcc.blank?
-    super
+    begin
+      # Log errors when raise_delivery_errors is set to false, Rails does not
+      mail.raise_delivery_errors = true
+      super
+    rescue Exception => e
+      if ActionMailer::Base.raise_delivery_errors
+        raise e
+      else
+        Rails.logger.error "Email delivery error: #{e.message}"
+      end
+    end
   end
 
   def self.method_missing(method, *args, &block)
diff --git a/test/unit/mailer_test.rb b/test/unit/mailer_test.rb
index f66e5763c..c4891678f 100644
--- a/test/unit/mailer_test.rb
+++ b/test/unit/mailer_test.rb
@@ -661,6 +661,29 @@ class MailerTest < ActiveSupport::TestCase
     assert_include '&lt;tag&gt;', html_part.body.encoded
   end
 
+  def test_should_raise_delivery_errors_when_raise_delivery_errors_is_true
+    mail = Mailer.test_email(User.find(1))
+    mail.delivery_method.stubs(:deliver!).raises(Exception.new("delivery error"))
+
+    ActionMailer::Base.raise_delivery_errors = true
+    assert_raise Exception, "delivery error" do
+      mail.deliver
+    end
+  ensure
+    ActionMailer::Base.raise_delivery_errors = false
+  end
+
+  def test_should_log_delivery_errors_when_raise_delivery_errors_is_false
+    mail = Mailer.test_email(User.find(1))
+    mail.delivery_method.stubs(:deliver!).raises(Exception.new("delivery error"))
+
+    Rails.logger.expects(:error).with("Email delivery error: delivery error")
+    ActionMailer::Base.raise_delivery_errors = false
+    assert_nothing_raised do
+      mail.deliver
+    end
+  end
+
   private
 
   def last_email