There are a couple of recurring error msgs related to email connectivity in the Stat server logs, but the SMTP connection test is working fine, emails are being sent out correctly according to the business rules set.
As I mentioned, the SMTP connection config from Stat agent server to mail server tests correctly, and all outbound mails are being sent.
DEBUG [QuartzWorkerThread-11] (InBoxBean.java:154) - No CSR mail settings found for 'F92'.
DEBUG: protocolConnect returning false, host=null, user=E03031$, password=
DEBUG: protocolConnect returning false, host=null, user=null, password=
DEBUG [QuartzWorkerThread-11] (InBoxBean.java:351) - javax.mail.AuthenticationFailedException: failed to connect, no user name specified