邮件国际化丢失等问题

app/models/mailer.rb

@@ -850,7 +850,7 @@ class Mailer < ActionMailer::Base
     @token = token
     @url = url_for(:controller => 'account', :action => 'activate', :token => token.value)
     mail :to => token.user.mail,
-         :subject => l(:mail_subject)
+         :subject => "#{Setting.mail_subject}"
   end
 
   def test_email(user)