Having Issues Connecting To Webmail Server Using My Phpmailer - php

Question

Have been trying to use phpmailer to send mail to my business mail purchase from monovm.com hosting provider with the below codes
<?php
//Import PHPMailer classes into the global namespace
//These must be at the top of your script, not inside a function
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
use PHPMailer\PHPMailer\SMTP;
require 'src/Exception.php';
require 'src/PHPMailer.php';
require 'src/SMTP.php';
require 'src/POP3.php';
//Instantiation and passing `true` enables exceptions
$mail = new PHPMailer(true);
try {
//Server settings
$mail->SMTPDebug = SMTP::DEBUG_SERVER; //Enable verbose debug output
$mail->isSMTP(); //Send using SMTP
$mail->Host = "smtp.haygoldinternational.com";
$mail->Port = 587; //Set the SMTP server to send through
$mail->SMTPAuth = true; //Enable SMTP authentication
$mail->Username = "office#haygoldinternational.com"; //SMTP username
$mail->Password = "mypassword"; //SMTP password
$mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS; //Enable TLS encryption; `PHPMailer::ENCRYPTION_SMTPS` encouraged
//TCP port to connect to, use 465 for `PHPMailer::ENCRYPTION_SMTPS` above
//Recipients
if(isset($_POST['btnSubmit']))
{
$mail->setFrom('office#haygoldinternational.com', 'HAYGOLD');
$mail->addAddress('office#haygoldinternational.com', 'HAYGOLD'); //Add a recipient
$mail->addReplyTo("toheebabiodun03#gmail.com", "Abiodun");
//Content
$mail->isHTML(true); //Set email format to HTML
$mail->Subject = "TESTING";
$mail->Body = "Just testing";
$mail->send();
echo 'Message Sent Successfully';
}
}
catch (Exception $e)
{
echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}
the error i keep getting is this
2021-04-03 15:37:28 SERVER -> CLIENT: 220 us2.outbound.mailhostbox.com ESMTP Postfix
2021-04-03 15:37:28 CLIENT -> SERVER: EHLO haygoldinternational.com
2021-04-03 15:37:28 SERVER -> CLIENT: 250-us2.outbound.mailhostbox.com250-PIPELINING250-SIZE 41648128250-VRFY250-ETRN250-STARTTLS250-AUTH PLAIN LOGIN250-AUTH=PLAIN LOGIN250-ENHANCEDSTATUSCODES250-8BITMIME250 DSN
2021-04-03 15:37:28 CLIENT -> SERVER: STARTTLS
2021-04-03 15:37:28 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS
SMTP Error: Could not connect to SMTP host.
2021-04-03 15:37:28 CLIENT -> SERVER: QUIT
2021-04-03 15:37:28 SERVER -> CLIENT:
2021-04-03 15:37:28 SMTP ERROR: QUIT command failed:
SMTP Error: Could not connect to SMTP host.
Message could not be sent. Mailer Error: SMTP Error: Could not connect to SMTP host.
What could have been the cause,i was able to use the same code to connect my gmail which work perfectly fine..
Please help a brother

Answer 1

Simpler than I suggested in my comment – the server you’re connecting to is not the one you asked to connect to. You asked for smtp.haygoldinternational.com but connected to us2.outbound.mailhostbox.com. This will make certificate verification fail, exactly as it should when it detects a name mismatch.
Either change your Host value to match it (if it’s expected), or find out why you’re being redirected there.