This has also happened to my Versalink C7020; it was scanning fine to email, but has stopped working. I'm on the latest firmware version (Current Version: 57.69.91) so far as I know.
Is there somewhere where we can download updated certificates to replace the ones on the machine, to see if that cures the problem?
You can try disabling the certificate. Here are the steps:
Since I updated my WorkCentre 6515DN to version 65.74.21, the emailfunction stopped working. It worked always before.
I get error: 017-714 Smtp over ssl failed.
I use Ziggo and used my email credentials. See screenshot.
I tried all 3 options STARTTLS, SSL/TLS but doesnt work anymore.
Who knows what the issue is?