SendFailedException is generated when createing users in TDM Portal

Document ID : KB000110877
Last Modified Date : 10/08/2018
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When creating users within TDM Portal the following exception is received:
Failed messages: javax.mail.SendFailedException: Invalid Addresses; nested exception is: com.sun.mail.smtp.SMTPAddressFailedException: 554 5.7.1 <unknown[]>: Client host rejected: Access denied
TDM Portal with an SMTP mail server configured.
The SMTP error codes "554 5.7.1" generally note that the message was rejected by the SMTP server.
Check the SMTP server configuration and ensure that it will allow messaged to be sent by the TDM Portal server. The TDM Portal server may need to white listed within the Access Control List.
Additional Information:
See RFC6409 for SMTP Error code definitions.