i have some info from another type of machine (same controller)
is this helpful?
The reason the device displays fault code 027-779 and is unable to authenticate is due to the use of CRAM-MD5 authentication enabled at the SMTP server.
The WC 5225/5230 design does not support CRAM-MD5 authentication. The following are supported authentication.
-LOGIN
-PLAIN
-NTLM