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How do a user know that his/her mail has not been delivered because of the following error...

Result: failed, Status: 5.4.0 554-esa9.com
[13/Oct/2014 16:26:10] 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.

OR How to configure the system, so that the user gets the notification.

Thank you,


Pavel Dobry (Kerio)

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User (sender) gets the Delivery Status Notification report automatically (after defined time period and number of delivery attempts configured on his SMTP server) from the delivery SMTP server.

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I would also recommend that you visit mxtoolbox.com and enter your domain name then, "Find Problems". This might lead to some clues as to what's behind the MTA's poor reputation.

Ken Snyder
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