diff --git a/app/models/mailer.rb b/app/models/mailer.rb
index b820e6d54..3168a4d4d 100644
--- a/app/models/mailer.rb
+++ b/app/models/mailer.rb
@@ -247,6 +247,7 @@ class Mailer < ActionMailer::Base
 
     has_content = [@issues,@issues_journals,@course_messages,@project_messages,@course_news,@course_news_comments,@project_news,@project_news_comments,@project_attachments,
                    @course_journal_messages,@user_journal_messages,@project_journal_messages,@forums,@memos,@attachments,@bids,@wiki_contents].any? {|o| !o.empty?}
+
     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
diff --git a/app/views/mailer/send_for_user_activities.html.erb b/app/views/mailer/send_for_user_activities.html.erb
index 6fc742c99..3f761fbd4 100644
--- a/app/views/mailer/send_for_user_activities.html.erb
+++ b/app/views/mailer/send_for_user_activities.html.erb
@@ -7,7 +7,7 @@
     <div class="wmail_main" style="padding:20px 10px 0px;">
       <h3 class="wmail_h2" style="color:#474646; "><%= l(:label_course_overview)%></h3>
       <!-- 课程通知 -->
-      <% unless @course_news.first.nil? || @course_news_comments.first.nil? %>
+      <% if !@course_news.first.nil? || !@course_news_comments.first.nil? %>
           <ul class="wmail_ul" style=" list-style-type:none;clear: both;margin-left:10px; border-bottom:1px dashed #cfcfcf; padding-bottom:15px; width:1020px; margin-bottom:15px;">
             <span class="wmail_h4" style="color:#474646; font-size:14px; margin-bottom:5px;" >
               <%= l(:label_course_news) %>
@@ -190,7 +190,7 @@
          @project_attachments.first %>
     <div class="wmail_main" style="padding:20px 10px 0px;">
       <h3 class="wmail_h2" style="color:#474646; "><%= l(:label_project_overview_new)%></h3>
-      <% unless @issues.first.nil? || @issues_journals.first.nil? %>
+      <% if !@issues.first.nil? || !@issues_journals.first.nil? %>
           <ul class="wmail_ul" style="margin-left:10px; border-bottom:1px dashed #cfcfcf; padding-bottom:15px; width:1020px; margin-bottom:15px;">
             <span class="wmail_h4" style="color:#666; font-size:14px; margin-bottom:5px;" >
               <%= l(:label_issue_tracking) %>
@@ -302,7 +302,7 @@
       <% end %>
 
       <!--项目新闻-->
-      <% unless @project_news.first.nil? || @project_news_comments.first.nil? %>
+      <% if !@project_news.first.nil? || !@project_news_comments.first.nil? %>
           <ul class="wmail_ul" style=" list-style-type:none;clear: both;margin-left:10px; border-bottom:1px dashed #cfcfcf; padding-bottom:15px; width:1020px; margin-bottom:15px;">
             <span class="wmail_h4" style="color:#666; font-size:14px; margin-bottom:5px;" >
               <%= l(:label_project_news) %>