I am using Outlook 360 for the domain e-copon.com. Recently I have been receiving many complaints from many persons that they are not able to send email to me. Sometimes I am getting emails, but most of the times I am not getting emails which is causing a severe concern for our operations.
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
email@example.com host smtp.secureserver.net [22.214.171.124] SMTP error from remote mail server after RCPT TO:<firstname.lastname@example.org>: 550 5.1.1 <email@example.com> Recipient not found. <http://x.co/irbounce>
From: Mail Delivery Subsystem <firstname.lastname@example.org> Date: 22 March 2018 at 10:00:13 AM GMT+3 To: email@example.com Subject: Delivery Status Notification (Failure)
Address not found Your message wasn't delivered to firstname.lastname@example.org because the address couldn't be found, or is unable to receive mail.
The response from the remote server was: 550 5.1.1 <email@example.com> Recipient not found. <http://x.co/irbounce>