PHPMailer uses local Sendmail to send email despite is set other way.

[ZaltorSupport]

Hello

I've got an issue with PHPMailer.

I've made that code

<?php
ini_set("display_errors", "1");
ini_set("display_startup_errors", "1");
error_reporting(E_ALL);

set_include_path(get_include_path() . PATH_SEPARATOR ."/usr/share/vendor"); //That one added is where PHPMailer is

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
use PHPMailer\PHPMailer\SMTP;

require 'phpmailer/phpmailer/src/Exception.php';
require 'phpmailer/phpmailer/src/PHPMailer.php';
require 'phpmailer/phpmailer/src/SMTP.php';
require 'autoload.php';

$mail = new PHPMailer(true); // Passing `true` enables exceptions

date_default_timezone_set('Europe/Madrid');

try {
        $mail->SMTPOptions = array(
                'ssl' => array(
                'verify_peer' => false,
                'verify_peer_name' => false,
                'allow_self_signed' => true
                )
        );
    $mail->SMTPDebug = 4; // Enable verbose debug output
    $mail->isSMTP(); // Set mailer to use SMTP
    $mail->host = "mx10.zaltor.es"; //that solves to 5.200.27.68
    $mail->Username = '[email protected]';  // Nombre de usuario SMTP
    $mail->Password = 'not_that_pass';  // Contraseña SMTP
   // Configuración del remitente y destinatario
    $mail->setFrom('[email protected]', 'Info Zaltor');  // Remitente
    $mail->addAddress($_POST['des_email'], $_POST['des_usuario']);  // Destinatario
    $subject = "Informe de fichaje de salida";
     $body = '<p>Hola, tu fichaje de salida ha sido en el momento '.$hora.' y tu motivo para salir es <b>'.$_POST['des_motivo'].'</b></p>';
    $text = 'Hola, tu fichaje de salida ha sido en el momento '.$hora.' y tu motivo para salir es '.$_POST['des_motivo'];

// Contenido del correo
    $mail->isHTML(true);  // Habilitar contenido HTML
    $mail->Subject = $subject;
    $mail->Body    = $body;
    $mail->AltBody = $text;
    $mail->send();
} catch (Exception $e) {
    echo 'Error al enviar el correo: ' . $mail->ErrorInfo;
}

?>

That should send the mail using that email server, but as I have the debug activated:

2023-06-13 16:01:58 Connection: opening to localhost:25, timeout=300, options=array ( 'ssl' => array ( 'verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true, ),)
2023-06-13 16:01:58 Connection: opened
2023-06-13 16:01:58 SMTP INBOUND: "220 fichar ESMTP Sendmail 8.15.2/8.15.2; Tue, 13 Jun 2023 18:01:58 +0200"
2023-06-13 16:01:58 SERVER -> CLIENT: 220 fichar ESMTP Sendmail 8.15.2/8.15.2; Tue, 13 Jun 2023 18:01:58 +0200
2023-06-13 16:01:58 CLIENT -> SERVER: EHLO 192.168.75.75
2023-06-13 16:01:58 SMTP INBOUND: "250-fichar Hello localhost [127.0.0.1], pleased to meet you"
2023-06-13 16:01:58 SMTP INBOUND: "250-ENHANCEDSTATUSCODES"
2023-06-13 16:01:58 SMTP INBOUND: "250-PIPELINING"
2023-06-13 16:01:58 SMTP INBOUND: "250-8BITMIME"
2023-06-13 16:01:58 SMTP INBOUND: "250-SIZE"
2023-06-13 16:01:58 SMTP INBOUND: "250-DSN"
2023-06-13 16:01:58 SMTP INBOUND: "250-ETRN"
2023-06-13 16:01:58 SMTP INBOUND: "250-AUTH GSSAPI"
2023-06-13 16:01:58 SMTP INBOUND: "250-STARTTLS"
2023-06-13 16:01:58 SMTP INBOUND: "250-DELIVERBY"
2023-06-13 16:01:58 SMTP INBOUND: "250 HELP"

I don't see any fault in my code. You can see is connecting to the local Sendmail, instead of the Email Server that is on mx10.zaltor.es

What could be happening...

When I go to the SSH console

[root@fichar vendor]# pwd
/usr/share/vendor
[root@fichar vendor]# cd phpmailer/
[root@fichar phpmailer]# cd phpmailer/
[root@fichar phpmailer]# ll
total 80
-rw-r--r-- 1 root root  2092 mar  6 15:43 COMMITMENT
-rw-r--r-- 1 root root  2675 mar  6 15:43 composer.json
-rw-r--r-- 1 root root  6226 mar  6 15:43 get_oauth_token.php
drwxr-xr-x 2 root root  4096 mar  6 15:43 language
-rw-r--r-- 1 root root 26529 mar  6 15:43 LICENSE
-rw-r--r-- 1 root root 16429 mar  6 15:43 README.md
-rw-r--r-- 1 root root  7584 mar  6 15:43 SECURITY.md
drwxr-xr-x 2 root root   154 mar  6 15:43 src
-rw-r--r-- 1 root root     5 mar  6 15:43 VERSION
[root@fichar phpmailer]# cd src
[root@fichar src]# ll
total 256
-rw-r--r-- 1 root root   6919 mar  6 15:43 DSNConfigurator.php
-rw-r--r-- 1 root root   1240 mar  6 15:43 Exception.php
-rw-r--r-- 1 root root   3774 mar  6 15:43 OAuth.php
-rw-r--r-- 1 root root   1522 mar  6 15:43 OAuthTokenProvider.php
-rw-r--r-- 1 root root 179441 mar  6 15:43 PHPMailer.php
-rw-r--r-- 1 root root  12259 mar  6 15:43 POP3.php
-rw-r--r-- 1 root root  47594 mar  6 15:43 SMTP.php
[root@fichar src]# php -v
PHP 7.4.33 (cli) (built: Oct 31 2022 10:36:05) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.33, Copyright (c), by Zend Technologies
[root@fichar src]#

[Synchro]

PHP is case-sensitive for property names and variables, so change this:

$mail->host = "mx10.zaltor.es"

to

$mail->Host = "mx10.zaltor.es"

Separately, disabling certificate verification is a really bad idea. If it's causing problems, fix them properly instead of hiding the evidence; there's plenty of info in the troubleshooting guide about that.

[XL-2000]

First of all, the reason for this happening is that to set the Host, you need to set the Host attribute with a capital H.
So; $mail->host = "mx10.zaltor.es"; shoud be $mail->Host = "mx10.zaltor.es";
Since you did not supply any Host, you default to localhost, which is exactly what happens in your case.

[XL-2000]

Next, please take note;
Providing ssl like

'verify_peer' => false,
                'verify_peer_name' => false,
                'allow_self_signed' => true

is bad! At least remove this in production.

Check if you need settings like "SMTP authentication" to true? Like;
$mail->SMTPAuth = true
Check if you need settings like SMTP encryption? Like;
$mail->SMTPSecure = 'tls';

[XL-2000]

PHP is case-sensitive for property names and variables, so change this:

$mail->host = "mx10.zaltor.es"

to

$mail->Host = "mx10.zaltor.es"

Separately, disabling certificate verification is a really bad idea. If it's causing problems, fix them properly instead of hiding the evidence; there's plenty of info in the troubleshooting guide about that.

What he said ;) He beat me to it ;)

[Synchro]

@XL-2000 I'm starting to feel like we might be the same person... 😛

[ZaltorSupport]

Hello

Thank you to all of you.

Seems it worked!