![Email Router CRM 2011/2013 Error: “System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first.” ~ Ms. Email Router CRM 2011/2013 Error: “System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first.” ~ Ms.](http://lh5.ggpht.com/-nhJW75KgFFc/U840Rj0wQ7I/AAAAAAAADGw/NstryqjvFFo/image_thumb%25255B3%25255D.png?imgmax=800)
Email Router CRM 2011/2013 Error: “System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first.” ~ Ms.
![The E-mail Router service could not process a provider work item using assembly - CRM Innovation - Microsoft Dynamics 365 Consulting and Marketing Solutions The E-mail Router service could not process a provider work item using assembly - CRM Innovation - Microsoft Dynamics 365 Consulting and Marketing Solutions](https://www.crminnovation.com/wp-content/uploads/2012/06/eventlog.png)
The E-mail Router service could not process a provider work item using assembly - CRM Innovation - Microsoft Dynamics 365 Consulting and Marketing Solutions
![Configure Microsoft Dynamics CRM Online E-mail Router with Exchange Online - Microsoft Dynamics 365 Blog Configure Microsoft Dynamics CRM Online E-mail Router with Exchange Online - Microsoft Dynamics 365 Blog](https://cloudblogs.microsoft.com/dynamics365/wp-content/wp-content/uploads/sites/4/2009/12/image_13.png)
Configure Microsoft Dynamics CRM Online E-mail Router with Exchange Online - Microsoft Dynamics 365 Blog
![validation - Dynamics CRM 2011 E-mail Router error: e-mail address is not associated with any approved forward mailbox user or queue record in CRM - Stack Overflow validation - Dynamics CRM 2011 E-mail Router error: e-mail address is not associated with any approved forward mailbox user or queue record in CRM - Stack Overflow](https://i.stack.imgur.com/H65H8.png)