Lexmark CX923
From the control panel
From the control panel, touch Settings > E‑mail > E‑mail Setup.
Configure the settings.
From the Embedded Web Server
Open a web browser, and then type the printer IP address in the address field.
Notes:
Click Settings > E‑mail.
From the E‑mail Setup section, configure the settings.
Click Save.
How to Initially Configure Scan to E‑mail or E‑mail Alerts
Get email transmission error codes and recommendations here.