Introduction
Emails are sent via your WordPress platform NOT the PremiumPress theme therefore if you are experiencing any issues with sending/receive emails please contact your hosting provider. All emails sent to users and admins within our themes use the WordPress (wp_mail) email settings.
The official WordPress email configuration guide can be found here;
http://codex.wordpress.org/Function_Reference/wp_mail
Email Shortcodes
If you are looking to customize your email content with shortcodes, the tutorial can be found here;
http://www.premiumpress.com/tutorial/email-shortcodes/
PHP mail and SMTP configuration
By default WordPress uses the PHP mail() function, some hosting providers require special settings to be applied to your WordPress installation in order for this to work, you should contact your hosting provider and work with them to ensure your emails are being sent correctly.
WordPress also supports SMTP mail (another type of mail service) but this needs to be configured separately via the admin area of WordPress.
The below plugins may help you if you are having problems with email;
http://wordpress.org/extend/plugins/wp-email/
http://wordpress.org/extend/plugins/email-users/
http://wordpress.org/extend/plugins/wp-mail-smtp/