Sounds like you have tried everything already, so it would be an escalation to support for assistance: 1-800-821-2797 or 1-800-835-6100
We have a Color 560 that does not send emails. I believe this used to work. I have been asked to set it up to scan to an email address. I have a Konica that does send emails. The settings are basically the same. I followed these directions except the SMTP port is 587. Configure SMTP (E-mail) Server Settings Using CentreWare Internet Services (CWIS) (xerox.com)
When I test I get an error of: "Completed with error (027-777) : Server un-supports SMTP-AUTH".
Does anyone have an idea of what I might be doing wrong?