Maileater functionality is not working. The maileater_nxd.log is reporting a "javax.mail.AuthenticationFailedException: Protocol error. 16" error
Release: 17.4 or higher
Component: CA Service Desk Manager
Mail server login functionality may have been updated. The above error may indicate that the login is being refused due to incorrect credentials, a problem with the mail certificate, or that the mail server is disallowing the authentication due to security level issues.
In one such scenario, the mailbox was configured for security level "Clear Text" and had to be changed to "LOGIN". Review with mail admins to see if there were any changes in the mail server authentication function.