Mail Delivery Failure

[Mail Delivery System]

This message was created automatically by the mail system (ecelerity).

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:

>>> ahmadhosban4 at gmail.com (after RCPT TO): 550-5.1.1 The email account that you tried to reach does not exist. Please try
550-5.1.1 double-checking the recipient's email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1  https://support.google.com/mail/?p=NoSuchUser r66si5870640itb.91 - gsmtp
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550-5.1.1 double-checking the recipient's email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1  https://support.google.com/mail/?p=NoSuchUser r66si5870640itb.91 - gsmtp
Action: failed
Final-Recipient: rfc822; ahmadhosban4 at gmail.com
Last-Attempt-Date: Fri, 02 Sep 2016 12:41:31 -0400
Status: 5.1.1
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