Add a delay for sending emails

app/mailers/notify.rb

@@ -10,6 +10,10 @@ class Notify < ActionMailer::Base
 
   default from: Gitlab.config.gitlab.email_from
 
+  # Just send email with 3 seconds delay
+  def self.delay
+    delay_for(2.seconds)
+  end
 
 
   #