Prevent unnecessary automated back-and-forth when sending noreply-emails

When you send automated emails from a noreply@-address, and the recipient has an out of office enabled, the autoreply bounces and they get an additional email with an error message.

To prevent the recipient's auto-response and the following error message you can set the email header Auto-Submitted: auto-generated in your mailer, for example like this:

class NoReplyMailer < ApplicationMailer
  default from: 'noreply@yourapp.com', 'Auto-Submitted' => 'auto-generated'
end