Issue wp_mail function not working in PHP 7.4.12

[AndreasY]

Hi,

using the basic script below

<?php
/**
 * This file can be used to validate that the WordPress wp_mail() function is working.
 * To use, change the email address in $to below, save, and upload to your WP root.
 * Then browse to the file in your browser.
 *
 * For full discussion and instructions, see the associated post here:
 * http://b.utler.co/9L
 *
 * Author:      Chad Butler
 * Author URI:  http://butlerblog.com/
 */

/* 
    Copyright (c) 2012-2015  Chad Butler
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License, version 2, as
    published by the Free Software Foundation.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    You may also view the license here:
    http://www.gnu.org/licenses/gpl.html
*/
 
// Set $to as the email you want to send the test to.
$to = "[email protected]";
 
// No need to make changes below this line.
 
// Email subject and body text.
$subject = 'wp_mail function test';
$message = 'This is a test of the wp_mail function: wp_mail is working';
$headers = '';
 
// Load WP components, no themes.
define('WP_USE_THEMES', false);
require('wp-load.php');
 
// send test message using wp_mail function.
$sent_message = wp_mail( $to, $subject, $message, $headers );

//display message based on the result.
if ( $sent_message ) {
    // The message was sent.
    echo 'The test message was sent. Check your email inbox.';
} else {
    // The message was not sent.
    echo 'The message was not sent!';
}

Results in failure to send mail

If we switch back to PHP version 7.3.42 the wp_mail function works as expected.

Anyhow else seeing this ?

It also failed to work when using version 7.4.11.

Found the below link with others experiencing such an issue when using PHP 7.4 and it was resolved when ammended PHP files were included in the PHP folder

Can’t Send Emails using PHP 7.4

Can’t Send Emails using PHP 7.4 Resolved Brad Brown (@bradbrownmagic) 5 years, 3 months ago I tested my site with the new PHP 7.4. Using 7.4 I am unable to send emails. It works with 7.3. Obv…

wordpress.org

Thanks