You can use Plesk to set up POP3 email accounts for your domain. Log in to Plesk as admin and open the Domain administration page for the domain you want to add email accounts to.
To Set Up Email Accounts for Your Domain in Plesk
Once you have created your email account, you can further customize the settings from within Plesk or connect to your account using an email client.
NOTE: Your POP3 and SMTP settings for this email account will be mail.domainname.com, where "domainname.com" is the name of your domain. Your incoming user name for the account is full_email_address@domainname.com. The outgoing (SMTP) server requires authentication and uses the same user name and password as the incoming (POP3) server.