+/**
+ * Fires to allow a plugin to do a complete takeover of Post by Email.
+ *
+ * @since 2.9.0
+ */
+do_action( 'wp-mail.php' );
+
+/** Get the POP3 class with which to access the mailbox. */
+require_once( ABSPATH . WPINC . '/class-pop3.php' );
+
+/** Only check at this interval for new messages. */
+if ( !defined('WP_MAIL_INTERVAL') )
+ define('WP_MAIL_INTERVAL', 300); // 5 minutes
+
+$last_checked = get_transient('mailserver_last_checked');