diff --git a/app/models/mailer.rb b/app/models/mailer.rb
index d35374fcf..a834ddb14 100644
--- a/app/models/mailer.rb
+++ b/app/models/mailer.rb
@@ -166,7 +166,7 @@ class Mailer < ActionMailer::Base
                    @course_journal_messages,@user_journal_messages,@forums,@memos,@attachments,@bids].any? {|o|
                     !o.empty?
                   }
-    binding.pry if Rails.env.development?
+    mylogger.debug "Sent activity mail : #{user.mail} - #{has_content}"
     #有内容才发，没有不发
     mail :to => user.mail,:subject => subject if has_content
   end
@@ -841,11 +841,12 @@ class Mailer < ActionMailer::Base
     end
 
     set_language_if_valid @initial_language
-    super headers do |format|
+    m = super headers do |format|
       format.text
       format.html unless Setting.plain_text_mail?
     end
-
+    mylogger.debug "Sent a mail from #{m.from} to [#{m.to},#{m.cc}, #{m.bcc if Setting.bcc_recipients?}] subject: #{m.subject}"
+    m
   end
 
   def initialize(*args)
@@ -900,7 +901,11 @@ class Mailer < ActionMailer::Base
   end
 
   def mylogger
-    Rails.logger
+    if Setting.delayjob_enabled? 
+      Delayed::Worker.logger
+    else
+      Rails.logger
+    end
   end
 
   def add_attachments(obj)