Override wp_mail

wp_mail_override.php

<?php

/**
CREATE TABLE `notifications` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `to` varchar(255) DEFAULT NULL,
  `subject` varchar(255) DEFAULT NULL,
  `message` text,
  `headers` text,
  `date` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
) DEFAULT CHARSET=latin1;
**/

function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() ) {
  global $wpdb;
  
  $wpdb->insert( 'notifications', array(
    'to' => $to,
    'subject' => $subject,
    'message' => $message,
    'headers' => json_encode($headers),
    'date' => current_time('mysql', 1)
  ));
}