Make sure that the printer is connected to a network and that the network is connected to the Internet.
Can you send or receive faxes using etherFAX?
The problem is solved.
Go to step 2.
From the home screen, touch Settings > Fax > Fax Setup > General Fax Settings.
Make sure that you have the correct fax number.
Make sure that Fax Transport is set to etherFAX.
Go to step 3.
Split large documents into smaller file sizes.
Go to https://www.etherfax.net/lexmark.
Are your fax messages not going through? Make sure that your printer is connected to a working analog telephone service.
Are you having issues transmitting your fax messages? Make sure that the document is loaded properly and enter the telephone number manually.