All emails sent to users and admins within our themes use the WordPress (wp_mail) email settings.
http://codex.wordpress.org/Function_Reference/wp_mail
Email issues are part of the WordPress installation and hosting enviroment, NOT our themes.
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/
