PHPMailer: Les messages HTML sont tronqués

Bonjour à tous, merci aux dévoués contributeurs.

Lors de l'envoi de mails le code Un exemple de texte avec <une partie en gras. est réceptionné comme ceci: Un exemple de texte avec .
J'ai créé une classe fille de PHPMailer nommée UsePHPMailer. Je donne ici les codes de la classe fille et du code d'utilisation.

Classe fille dans classes/moimp/UsePHPMailer.php:

Code:

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<?php
 
namespace UsePHPMailer;
 
require_once('vendor/phpmailer/phpmailer/src/PHPMailer.php');
require_once("vendor/phpmailer/phpmailer/src/SMTP.php");
require_once("vendor/phpmailer/phpmailer/src/Exception.php");
require_once("classes/moimp/StringTools.php");
 
use \PHPMailer\PHPMailer\PHPMailer;
use \PHPMailer\PHPMailer\SMTP;
use \Exception;
 
class UsePHPMailer extends PHPMailer
{
 
	protected $fromMail;
 
	protected $fromName;
 
	protected $languageDir;
 
	protected $language2;
 
	public function __construct(array $paramsBase)
	{
		extract($paramsBase);	// VOIR LE CAS OU IL MANQUE DES VARIABLES
 
		if ( ! in_array($CharSet, ['utf-8', 'ASCII']) )
			throw new Exception( sprintf("Params offset 'CharSet' in method '%s' must be 'utf-8' or 'ASCII'", __METHOD__) );
 
		if (strlen($language) !== 2)
			throw new Exception( sprintf("Params offset 'language' in method '%s' must be a valid language code with 2-characters (see RFC 639-1).", __METHOD__) );
 
		if ( ! is_dir($languageDir) )
			throw new Exception( sprintf("Params offset 'languageDir' in method '%s' is no valid path. Path must be language path of PHPMailer.", __METHOD__) );
 
		parent::__construct(true);
		$this->CharSet		= $CharSet;
		$this->language2	= $language;
		$this->setLanguage($language, $languageDir);
	}
 
	public function setSMTP(array $paramsSMTP)
	{
		extract($paramsSMTP);	// VOIR LE CAS OU IL MANQUE DES VARIABLES
 
		if ( ! in_array($SMTPDebug, [SMTP::DEBUG_OFF, SMTP::DEBUG_CLIENT, SMTP::DEBUG_SERVER]) )
			throw new Exception( sprintf("Params offset 'SMTPDebug' must be one of values SMTP::DEBUG_OFF, SMTP::DEBUG_CLIENT or SMTP::DEBUG_SERVER in method '%s'.", __METHOD__) );
 
		if ( ! is_string($Host) )
			throw new Exception( sprintf("Params offset 'Host' must be a string in method '%s.", __METHOD__) );
 
		if ( ! is_string($Username) )
			throw new Exception( sprintf("Params offset 'Username' must be a string (oft based on email address of sender) in method '%s.", __METHOD__) );
 
		if ( ! is_string($Password) )
			throw new Exception( sprintf("Params offset 'password' must be a string in method '%s'.", __METHOD__) );
 
		if ( ! is_bool($SMTPAuth) )
			throw new Exception( sprintf("Params offset 'SMTPAuth' must be a boolean in method '%s'.", __METHOD__) );
 
		if ( ! is_int($Port) )
			throw new Exception( sprintf("Params offset 'port' must be an integer in method '%s'.", __METHOD__) );
 
		$this->isSMTP();
 
		$this->SMTPDebug= $SMTPDebug;
		$this->Host		= $Host;
		$this->Port		= $Port;
		$this->SMTPAuth	= $SMTPAuth;
		$this->Username	= $Username;
		$this->Password	= $Password;
	}
 
	public function setContent(array $content)
	{
		extract($content);	// VOIR LE CAS OU IL MANQUE DES VARIABLES
 
		if ( ! \StringTools::isMail($fromMail) )
			throw new Exception(sprintf("Params offset 'fromMail' is not a valid mail in method '%s'.", __METHOD__) );
 
		if ( ! is_string($fromMail) )
			throw new Exception(sprintf("Params offset 'fromMail' must be a string in method '%s'.", __METHOD__) );
 
		if ( ! is_string($fromName) )
			throw new Exception(sprintf("Params offset 'fromName' must be a string in method '%s'.", __METHOD__) );
 
		if ( ! is_string($Subject) )
			throw new Exception(sprintf("Params offset 'Subject' must be a string in method '%s'.", __METHOD__) );
 
		if ( ! is_string($Body) )
			throw new Exception(sprintf("Params offset 'Body' must be a string in method '%s'.", __METHOD__) );
 
		if ( ! is_string($AltBody) )
			throw new Exception(sprintf("Params offset 'AltBody' must be a string in method '%s'.", __METHOD__) );
 
$html = <<<HTML
<!DOCTYPE html>
<html lang='%s'>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <title>%s</title>
</head>
<body>
	<div style="width: 640px; font-family: Arial, Helvetica, sans-serif; font-size: 12px;">
		%s
	</div>
</body>
</html>
HTML;
		$Body = sprintf($html, $this->language2, $Subject, $Body);
		$this->fromMail	= $fromMail;
		$this->fromName	= $fromName;
		$this->Subject	= $Subject;
		$this->Body		= $Body;
		$this->AltBody	= $AltBody;
	}
 
	public function execute():string
	{
		$this->setFrom($this->fromMail, $this->fromName);
		var_dump($this);
 
		if( ! parent::send() )
		{
			return "Email was not sent.";
		}
 
		else
		{
			return "Email was sent.";
		}
 
	}
 
}
 
class_alias('UsePHPMailer\UsePHPMailer', 'UsePHPMailer', false);

et le code d'utilisation dans _essais.php:

Code:

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require_once("classes/moimp/UsePHPMailer.php");
require_once("vendor/phpmailer/phpmailer/src/SMTP.php");
use PHPMailer\PHPMailer\SMTP;
 
$paramsBase = [
	'CharSet'		=>'utf-8',
	'language'		=>'fr',
	'languageDir'	=>'vendor/phpmailer/phpmailer/language/',
	'isHTML'		=>true,
	];
 
$paramsSMTP = [
	'SMTPDebug'	=>SMTP::DEBUG_SERVER,
	'Host'		=>'smtp.orange.fr',
	'Username'	=>'exemple@orange.fr',
	'Password'	=>'password',
	'SMTPAuth'	=>true,
	'Port'		=>587,
	'SMTPSecure'=>'TLS',
	];
 
$content = [
	'fromMail'	=>exemple@orange.fr',
	'fromName'	=>'Moimp',
	'Subject'	=>'Essai',
	'Body'		=>"<p>Un exemple de texte avec <strong><une partie en gras</strong>.</p>",
	'AltBody'	=>"Exemple de texte brut",
	];
 
$test = new UsePHPMailer($paramsBase);
$test->setSMTP($paramsSMTP);
$test->addAddress('destinataire@free.fr', 'Prénom Nom');
$test->setContent($content);
echo $test->execute();

EDIT: J'ai oublié de mettre le rapport de deboggage:

2023-07-11 13:46:59 SERVER -> CLIENT: 220 opmta1mto24nd1 smtp.orange.fr ESMTP server ready
2023-07-11 13:46:59 CLIENT -> SERVER: EHLO mp-tools
2023-07-11 13:46:59 SERVER -> CLIENT: 250-opmta1mto24nd1 hello [88.170.16.41], pleased to meet you250-HELP250-AUTH LOGIN PLAIN250-SIZE 46000000250-ENHANCEDSTATUSCODES250-PIPELINING250-8BITMIME250-STARTTLS250 OK
2023-07-11 13:46:59 CLIENT -> SERVER: STARTTLS
2023-07-11 13:46:59 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS
2023-07-11 13:46:59 CLIENT -> SERVER: EHLO mp-tools
2023-07-11 13:46:59 SERVER -> CLIENT: 250-opmta1mto24nd1 hello [88.170.16.41], pleased to meet you250-HELP250-AUTH LOGIN PLAIN250-SIZE 46000000250-ENHANCEDSTATUSCODES250-PIPELINING250-8BITMIME250-STARTTLS250 OK
2023-07-11 13:46:59 CLIENT -> SERVER: AUTH LOGIN
2023-07-11 13:46:59 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2023-07-11 13:46:59 CLIENT -> SERVER: [credentials hidden]
2023-07-11 13:46:59 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2023-07-11 13:46:59 CLIENT -> SERVER: [credentials hidden]
2023-07-11 13:46:59 SERVER -> CLIENT: 235 2.7.0 ... authentication succeeded
2023-07-11 13:46:59 CLIENT -> SERVER: MAIL FROM:<emetteur@orange.fr>
2023-07-11 13:46:59 SERVER -> CLIENT: 250 2.1.0 <emetteur@orange.fr> sender ok
2023-07-11 13:46:59 CLIENT -> SERVER: RCPT TO:<destinataire@free.fr>
2023-07-11 13:47:00 SERVER -> CLIENT: 250 2.1.5 <destinataire@free.fr> recipient ok
2023-07-11 13:47:00 CLIENT -> SERVER: DATA
2023-07-11 13:47:00 SERVER -> CLIENT: 354 OK
2023-07-11 13:47:00 CLIENT -> SERVER: Date: Tue, 11 Jul 2023 13:46:59 +0000
2023-07-11 13:47:00 CLIENT -> SERVER: To: Moi <destinataire@free.fr>
2023-07-11 13:47:00 CLIENT -> SERVER: From: Moimp <emetteu@orange.fr>
2023-07-11 13:47:00 CLIENT -> SERVER: Subject: Essai
2023-07-11 13:47:00 CLIENT -> SERVER: Message-ID: <rpP3JoHGIS0VYzIhCJMLoba7ZCghy2eEmukZ3vypSUs@mp-tools>
2023-07-11 13:47:00 CLIENT -> SERVER: X-Mailer: PHPMailer 6.8.0 (https://github.com/PHPMailer/PHPMailer)
2023-07-11 13:47:00 CLIENT -> SERVER: MIME-Version: 1.0
2023-07-11 13:47:00 CLIENT -> SERVER: Content-Type: multipart/alternative;
2023-07-11 13:47:00 CLIENT -> SERVER: boundary="b1=_rpP3JoHGIS0VYzIhCJMLoba7ZCghy2eEmukZ3vypSUs"
2023-07-11 13:47:00 CLIENT -> SERVER: Content-Transfer-Encoding: 8bit
2023-07-11 13:47:00 CLIENT -> SERVER:
2023-07-11 13:47:00 CLIENT -> SERVER: --b1=_rpP3JoHGIS0VYzIhCJMLoba7ZCghy2eEmukZ3vypSUs
2023-07-11 13:47:00 CLIENT -> SERVER: Content-Type: text/plain; charset=us-ascii
2023-07-11 13:47:00 CLIENT -> SERVER:
2023-07-11 13:47:00 CLIENT -> SERVER: Exemple de texte brut
2023-07-11 13:47:00 CLIENT -> SERVER:
2023-07-11 13:47:00 CLIENT -> SERVER: --b1=_rpP3JoHGIS0VYzIhCJMLoba7ZCghy2eEmukZ3vypSUs
2023-07-11 13:47:00 CLIENT -> SERVER: Content-Type: text/html; charset=us-ascii
2023-07-11 13:47:00 CLIENT -> SERVER:
2023-07-11 13:47:00 CLIENT -> SERVER: <!DOCTYPE html>
2023-07-11 13:47:00 CLIENT -> SERVER: <html lang='fr'>
2023-07-11 13:47:00 CLIENT -> SERVER: <head>
2023-07-11 13:47:00 CLIENT -> SERVER: <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
2023-07-11 13:47:00 CLIENT -> SERVER: <title>Essai</title>
2023-07-11 13:47:00 CLIENT -> SERVER: </head>
2023-07-11 13:47:00 CLIENT -> SERVER: <body>
2023-07-11 13:47:00 CLIENT -> SERVER: <div style="width: 640px; font-family: Arial, Helvetica, sans-serif; font-size: 12px;">
2023-07-11 13:47:00 CLIENT -> SERVER: <p>Un exemple de texte avec <strong><une partie en gras</strong>.</p>
2023-07-11 13:47:00 CLIENT -> SERVER: </div>
2023-07-11 13:47:00 CLIENT -> SERVER: </body>
2023-07-11 13:47:00 CLIENT -> SERVER: </html>
2023-07-11 13:47:00 CLIENT -> SERVER:
2023-07-11 13:47:00 CLIENT -> SERVER:
2023-07-11 13:47:00 CLIENT -> SERVER: --b1=_rpP3JoHGIS0VYzIhCJMLoba7ZCghy2eEmukZ3vypSUs--
2023-07-11 13:47:00 CLIENT -> SERVER:
2023-07-11 13:47:00 CLIENT -> SERVER: .
2023-07-11 13:47:00 SERVER -> CLIENT: 250 2.0.0 JDhkqHCqJP7mwJDhkqz79p mail accepted for delivery
2023-07-11 13:47:00 CLIENT -> SERVER: QUIT
2023-07-11 13:47:00 SERVER -> CLIENT: 221 2.0.0 opmta1mto24nd1 smtp.orange.fr closing connection