You can view information about mail sever using cPanel; by navigating to the cPanel 'Mail Client Configuration' page, and this page provides information about the mail server.
Hosting Account->Manage->cPanel(quick links)->Email Accounts->FTP Accounts-> Mail Client Configuration.
Manage page (then click cPanel, within the Quick Links section)
cPanel page (then click Email Accounts icon, within the Mail section)
Email Accounts page (then click Configure Email Client pop-up)