M477fdw Scan to Email suddenly stopped working

[JGF54]

Up until yesterday my scan to email worked flawlessly. Now it will start the scan and read one page, sit there for about a minute, and them quit with the message "An error occurred while sending the e-mail. Please try again later". I have upgraded the firmware, and updated the app passwords with both O365 and **bleep**. I am using the legacy-smtp endpoint for O365. The test emails work fine from the web interface, but once I try to scan it fails. Unfortunately there is no log that I can find to examine to determine where the failure is occurring and the error message is entirely unhelpful. Anyone else suddenly getting this problem and/or have any idea how to correct it? (Scan to network folder works fine).

[Repairatrooper]

I have run into this issue with some enterprise level products, I do not know if you have the same setting abilities on a 477.

What you want to check is which TLS level the printer is trying to use. On some models there is a minimum and maximum value listed. Usually Min 1.2  Max 1.3.  Change the max to 1.2 as well and that might fix your issue.

[JGF54]

Thanks for your input. The M477 does not allow setting the TLS level, in fact there is no indication as to what level it is at all. However I do not think this is relevant as I am able to send a test email which would imply that the scanner is able to send an email. It is just not able to send a scan to the exact same address as the test.