in case of my xerox 7120 printer (firmware version 71.24.12) the problem was twofold:
1.
outdated printer web interface, which does not save the radio button state "IDENT. SMTP" when you use the latest web browsers. For me it worked properly only with Windows Internet Explorer 8.
2.
the printer has an obsolete implementation of SSL. Fortunately, the STARTTLS protocol works with my email provider.
1.
outdated printer web interface, which does not save the radio button state "IDENT. SMTP" when you use the latest web browsers. For me it worked properly only with Windows Internet Explorer 8.
2.
the printer has an obsolete implementation of SSL. Fortunately, the STARTTLS protocol works with my email provider.