PHPMailer sending emails from different email host

Hey guys, I'm trying to send an email with PHPMailer but I get a 500 error without any real explanation, this is a singular php page so I don't have any logs.

The email is custom so not like a gmail account, so I'm unsure if my config is wrong here. How can I get this to send an email that comes from [email protected]?

<?php
//Import PHPMailer classes into the global namespace
  use PHPMailer\PHPMailer\PHPMailer;
  use PHPMailer\PHPMailer\Exception;
  require 'PhpMailer/src/Exception.php';
  require 'PhpMailer/src/PHPMailer.php';
  require 'PhpMailer/src/SMTP.php';

//Create an instance; 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.sal.com';                    //Set the SMTP server to send through
    $mail->SMTPAuth   = true;                                   //Enable SMTP authentication
    $mail->Username   = '[email protected]';           //SMTP username
    $mail->Password   = 'password';                             //SMTP password
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;            //Enable implicit TLS encryption
    $mail->Port       = 465;                                    //TCP port to connect to; use 587 if you have set `SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS`

    //Recipients
    $mail->setFrom('[email protected]');
    $mail->addAddress('[email protected]'); 

    //Content
    $mail->isHTML(true);                                  //Set email format to HTML
    $mail->Subject = 'Here is the subject';
    $mail->Body    = 'This is the HTML message body <b>in bold!</b>';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}