wp_mail() is a wraper function avaliable in wordpress core that can send emails. You can use wp_mail() to send emails from wordpress/woocommerce plugins and themes.
function devnodes_send_email($message)
{
// True because $a is empty
if (empty($message)) {
$message = 'This is the body message';
}
//to address
$to = '[email protected]';
$headers = 'From: Devnodes.in <[email protected]>' . '\r\n';
$subject = 'Sending Message using wp_mail function';
//now call wp_mail() function to send the message
//when the email was sent successfully wp_mail() will return true.
return wp_mail($to, $subject, $message, $headers);
}