Email delivery via publish tasks is not working or is inconsistent where some email delivery works and fails intermittently with the logged scheduler error: 5.7.3 Authentication unsuccessful
This article describes how to resolve the error 5.7.3 Authentication unsuccessful. This error indicates that you are connected to a clustered alias Email Server name rather than a specific cluster node.
Cause:
NPrinting is unable to navigate email delivery to a load balanced/clustered email server friendly alias/URL.
Resolution:
In the NPrinting SMTP settings, do not use the Email Server Alias name. Please use a single node exchange server computer address rather than the clustered email server alias address.
