所有发邮件都新开线程

app/models/mailer.rb

@@ -446,8 +446,10 @@ class Mailer < ActionMailer::Base
   
   def self.deliver_mail(mail)
     return false if mail.to.blank? && mail.cc.blank? && mail.bcc.blank?
+    Thread.new do
       super
     end
+  end
 
   def self.method_missing(method, *args, &block)
     if m = method.to_s.match(%r{^deliver_(.+)$})