You can use javamail to send out emails from your JSP code and using our local smtp server. Please note that you need to specify the port number for javamail within your code to be port "125" or port "2525" ( mail.smtp.port=125 ) instead of the standard port 25 otherwise your emails will not go through.
IMPORTANT: In order to use our SMTP service you need to set your code to require Authentication and you need to authenticate through your code using an email account (email@yourdomain.com) and password which exist in your domain name hosted with us. You need to create your email account first using the provided cPanel/Plesk control panel.