How do I test email from a specific internal ip address using "Telnet". I thought I saw this done but can't remember how?

We have a copier/printer that allows us to walk up to it and scan to email.  This is not functioning right now.  I can ping the copier from any workstation and can even log into its web access.  But the scan feature is not working.  I wanted to run a test to see if that specific address could send email and maybe receive some error messages if it couldn't for something to go on.  I thought I remember a Microsoft technician doing this once but can't remember what he did.  Does anyone know what I am referring to.