<?php if ( ! defined( 'ABSPATH' ) ) { exit; // Exit if accessed directly } class PostmanMailNotify implements Postman_Notify { public function send_message($message) { $to_email = apply_filters( 'post_smtp_notify_email',get_bloginfo( 'admin_email' ) ); $domain = get_bloginfo( 'url' ); mail( $to_email, "{$domain}: " . __( 'Post SMTP email error', 'post-smtp' ), $message , '', "-f{$to_email}" ); } }