Lexmark MX321
From the control panel, navigate to:
> Settings > > Device > > Preferences > > Run Initial Setup > > Yes
Turn off the printer, wait for about 10 seconds, and then turn on the printer.
From the Before You Begin screen, select Change the Settings and Continue with the Wizard.
From the Fax/Email Server Setup screen, enter the needed information.
Finish the setup.
Configure your printer to send e‑mails.
Here are steps on how to set up Gmail SMTP server for Lexmark 2016 up to the latest devices.