Lexmark MC3426
Sleep mode
From the home screen, touch Settings > Device > Power Management > Timeouts > Sleep Mode.
Specify the amount of time that the printer stays idle before it enters Sleep Mode.
Hibernate mode
From the home screen, touch Settings > Device > Power Management > Timeouts > Hibernate Timeout.
Select the amount of time that the printer stays idle before it enters Hibernate mode.
Notes:
Learn the email SMTP settings for your email service provider.
Manually assign a specific paper size not available in the printer paper menu.