Lexmark XC6152
From the home screen, touch Settings > Fax > Analog Fax Setup > Fax Receive Settings > Admin Controls.
Configure the Fax Forwarding, Forward To, and Forward to Shortcut settings.
Apply the changes.
Lexmark CX/CS8xx_72x and XC/Cxxxx: Fax Forwarding Issues
Send copies of urgent notices or documents through the printer or from the computer.