The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM
System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM
Release : 21.2
Component : NQRACO - NETQOS RA CONSOLE
The problem is in Exchange settings. The IP of the NFA server is blocked
Unblock the NFA Server IP
Use telnet command to test the port