Spectrum OneClick error: The web server returned error: Message(s) 501 5.1.7 Invalid address

Document ID : KB000051474
Last Modified Date : 14/02/2018
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Description:

This mail error occurs when trying to set up an email account for use with Alarm Notification.

Solution:

This error is coming from the Exchange server. It can be resolved using the following document:

"3rd Party Application or Mail Server May Fail to Send To or Relay Mail through Exchange Server 2007."

You can find the document at: http://support.microsoft.com/kb/944302.