Yes, you can create a subdomain — such as mail.example.com — for email-related functions. While creating the subdomain itself doesn't enable email sending or receiving, it can be used as a hostname for services like your webmail login page or mail server settings (e.g., SMTP, IMAP, or POP connections).
This is commonly done to organize services and make your email configuration more user-friendly and professional. For example, businesses often use mail.example.com as the branded address for accessing webmail or configuring email clients.
Be sure to also configure the appropriate DNS records (such as MX, A, or CNAME) and mail server settings to ensure the subdomain functions properly with your email system.
For more information on setting up subdomains in cPanel, check out our tutorial: How to Create Subdomains in cPanel.