Error message while email service is working

[sergiuRemes]

Please check these things before submitting your issue:

• Read the error message you're seeing - it often tells you what is wrong, and may contain useful links & instructions
• Make sure you're using the latest version of PHPMailer
• Check that your problem is not dealt with in the troubleshooting guide, especially if you're having problems connecting to Gmail or GoDaddy
• Include sufficient code to reproduce your problem
• If you're having an SMTP issue, include the debug output generated with SMTPDebug = 2 set
• If you have a question about how to use PHPMailer (rather than reporting a bug in it), tag a question on Stack Overflow with phpmailer, but search first!

Problem description

• My email service is working.
• I get a 200 status code on the contact.php file after submiting the form.

But, in the response I am getting the above message:
"2022-11-03 12:50:34 SERVER -> CLIENT: 220 smtp.gmail.com ESMTP z23-20020a1c4c17000000b003b31c560a0csm1168771wmf.12 - gsmtp . . . "

And on the html page, under the form, I get (the whole message is here - same message in the response) this message as an error:

> Error: 2022-11-03 12:50:34 SERVER -> CLIENT: 220 smtp.gmail.com ESMTP z23-20020a1c4c17000000b003b31c560a0csm1168771wmf.12 - gsmtp
> 2022-11-03 12:50:34 CLIENT -> SERVER: EHLO localhost
> 2022-11-03 12:50:34 SERVER -> CLIENT: 250-smtp.gmail.com at your service, [2a00:23c8:3e80:dc01:59a6:9ff:97f:b70a]250-SIZE 35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8
> 2022-11-03 12:50:34 CLIENT -> SERVER: STARTTLS
> 2022-11-03 12:50:34 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS
> 2022-11-03 12:50:34 CLIENT -> SERVER: EHLO localhost
> 2022-11-03 12:50:34 SERVER -> CLIENT: 250-smtp.gmail.com at your service, [2a00:23c8:3e80:dc01:59a6:9ff:97f:b70a]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8
> 2022-11-03 12:50:34 CLIENT -> SERVER: AUTH LOGIN
> 2022-11-03 12:50:34 SERVER -> CLIENT: 334 VXNlcm5hbWU6
> 2022-11-03 12:50:34 CLIENT -> SERVER: [credentials hidden]
> 2022-11-03 12:50:34 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
> 2022-11-03 12:50:34 CLIENT -> SERVER: [credentials hidden]
> 2022-11-03 12:50:34 SERVER -> CLIENT: 235 2.7.0 Accepted
> 2022-11-03 12:50:34 CLIENT -> SERVER: MAIL FROM:<[email protected]>
> 2022-11-03 12:50:34 SERVER -> CLIENT: 250 2.1.0 OK z23-20020a1c4c17000000b003b31c560a0csm1168771wmf.12 - gsmtp
> 2022-11-03 12:50:34 CLIENT -> SERVER: RCPT TO:<[email protected]>
> 2022-11-03 12:50:34 SERVER -> CLIENT: 250 2.1.5 OK z23-20020a1c4c17000000b003b31c560a0csm1168771wmf.12 - gsmtp
> 2022-11-03 12:50:34 CLIENT -> SERVER: DATA
> 2022-11-03 12:50:35 SERVER -> CLIENT: 354 Go ahead z23-20020a1c4c17000000b003b31c560a0csm1168771wmf.12 - gsmtp
> 2022-11-03 12:50:35 CLIENT -> SERVER: Date: Thu, 3 Nov 2022 13:50:34 +0100
> 2022-11-03 12:50:35 CLIENT -> SERVER: To: [email protected]
> 2022-11-03 12:50:35 CLIENT -> SERVER: From: Mailer <[email protected]>
> 2022-11-03 12:50:35 CLIENT -> SERVER: Subject: Here is the subject
> 2022-11-03 12:50:35 CLIENT -> SERVER: Message-ID: <DdapHpSfH40ix3EOlf60U9544EaVxzEWtc7Ug8yfI@localhost>
> 2022-11-03 12:50:35 CLIENT -> SERVER: X-Mailer: PHPMailer 6.6.5 (https://github.com/PHPMailer/PHPMailer)
> 2022-11-03 12:50:35 CLIENT -> SERVER: MIME-Version: 1.0
> 2022-11-03 12:50:35 CLIENT -> SERVER: Content-Type: text/html; charset=iso-8859-1
> 2022-11-03 12:50:35 CLIENT -> SERVER:
> 2022-11-03 12:50:35 CLIENT -> SERVER: This is the HTML message body <b>in bold!</b>
> 2022-11-03 12:50:35 CLIENT -> SERVER:
> 2022-11-03 12:50:35 CLIENT -> SERVER: .
> 2022-11-03 12:50:35 SERVER -> CLIENT: 250 2.0.0 OK 1667479836 z23-20020a1c4c17000000b003b31c560a0csm1168771wmf.12 - gsmtp
> 2022-11-03 12:50:35 CLIENT -> SERVER: QUIT
> 2022-11-03 12:50:35 SERVER -> CLIENT: 221 2.0.0 closing connection z23-20020a1c4c17000000b003b31c560a0csm1168771wmf.12 - gsmtp
> Message sent

If I use $mail->SMTPDebug = 0; OR false; the message is:
> Error: Message sent

Code to reproduce

my contact.php file:

require 'C:/xampp/htdocs/sergiuremes.com/forms/vendor/phpmailer/src/PHPMailer.php';
require 'C:/xampp/htdocs/sergiuremes.com/forms/vendor/phpmailer/src/SMTP.php';
require 'C:/xampp/htdocs/sergiuremes.com/forms/vendor/phpmailer/src/Exception.php';
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;
require 'vendor/autoload.php';

$mail = new PHPMailer(true);
try {
    $mail->SMTPDebug = 2;                    
    $mail->isSMTP();                                          
    $mail->Host       = 'smtp.gmail.com';                    
    $mail->SMTPAuth   = true;                                   
    $mail->SMTPSecure = 'tls';             
    $mail->Port       = 587;                                   
    $mail->Username   =  //SMTP username                   
    $mail->Password   =  //SMTP password                        
    $mail->Subject = 'Here is the subject';
    $mail->setFrom(//SMTP username , 'Mailer');
    $mail->isHTML(true);                                 
    $mail->Body    = 'This is the HTML message body <b>in bold!</b>';
    $mail->addAddress('[email protected]');       
    $mail->Send();
    
    echo "Message sent";     
         
 } catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
   }_
 

Debug output

Why do I get the error message?
How can it be fixed?

Many thanks!

[Synchro]

It's not PHPMailer generating that "Error:" string – it must be something in your own code. You seems to be considering that any output at all is an error, which is not true.

Minor point - learn how to use composer properly. You're loading its autoloader, but short-circuiting it by loading PHPMailer's classes yourself, which you don't need to do if you're using composer.