Digest for rubyonrails-core@googlegroups.com - 1 Message in 1 Topic

This is a delivery failure notification message indicating that an email you sent could not be delivered. The problem appears to be : -- Recipient email server rejected the message

This condition occurred after 1 attempt(s) to deliver over a period of 0 hour(s).

If you sent the email to multiple recipients, you will receive one of these messages for each one which failed delivery, otherwise they have been sent.