NPrinting SMTP - Email fails When Using Anonymous Authentication

When using an SMTP server which is configured to allow " Anonymous Authentication " the email fails.

• You receive "Email not sent. Check your email configuration." when using the Send test email button
• The NPrinting scheduler logs also show: "Failed to send email" " 5.5.4 Unrecognized Authentication type "

Environments:

NPrinting 17.6 and up

Incorrectly specifying a username and password for an SMTP server that allows Anonymous Authentication.  This is a change in the email authentication mechanisms since NPrinting November 2017.

If you are using an SMTP relay server that uses Anonymous Authentication you do no need to specify a username and password in the NPrinting email settings, leave these fields blank. Try to send the email again.

As an example to configure SMTP settings in the NPrinting Webconsole for an SMTP server using Anonymous Authentication:

Go to Admin > Settings > Email Settings 

Name: A name of your choice
Address:   The full address of your SMTP server
Port:  25

Username: leave this blank
Password: leave this blank

Default sender email: The email address you want the emails to come from.
Test email address: Your own email address to test with.