you will need to call Xerox I guess, every thing you state applies to the General release firmware available on Xerox.com, and it was all fixed in the spar version I actually linked.
The only other place to look is the printers own hostname.
When you call Xerox though, have the Wireshark trace of the attempted scan to supply them and a pdf copy of the configuration report from the device (So they can use that to cross reference the network traffic in the trace)
The firmware is already the latest version, less secure apps are already enabled, and no devices are being blocked (I had already taken these steps), still the error occurs.
As I stated, update the firmware
Login via web browser as the account the device is using and make sure it did not block it
Even with the gmail account I have set up and with those settings, I still get an error saying "Unable to send test Email. Hostname is not accessible", I can't for the life of me think what I'm missing.
SMTPS is SSL/TLS, it is a newer term for exactly the same thing.
I don't use Yahoo email but know it works in current firmware releases.
Gmail works flawlessly with
My guess is that part of your issue will be the time on the device being off more than 2 minutes of local.
I'm trying to set up a scan to email on our new Altalink C8030, on every other printer we have we select the SSL\TLS encryption and it works just fine, but this isn't an option on the unit we have, there is only STARTTLS or SMTPS, is there a way to add the encryption method?
I tried generic yahoo and gmail accounts with starttls and kept getting errors at different stages such as "Hostname is not available". I managed to send a successful test email from the gmail set up one time, and all other times start getting the error again.