Php Mailer

office356.php

<?php
//Import the PHPMailer class into the global namespace
use PHPMailer\PHPMailer\PHPMailer; //important, on php files with more php stuff move it to the top
use PHPMailer\PHPMailer\SMTP; //important, on php files with more php stuff move it to the top

//SMTP needs accurate times, and the PHP time zone MUST be set
//This should be done in your php.ini, but this is how to do it if you don't have access to that
date_default_timezone_set('Etc/UTC');

require 'path/to/vendor/autoload.php'; //important

//Enable SMTP debugging
// SMTP::DEBUG_OFF = off (for production use)
// SMTP::DEBUG_CLIENT = client messages
// SMTP::DEBUG_SERVER = client and server messages
//$mail->SMTPDebug = SMTP::DEBUG_off;

//SMTP
$mail = new PHPMailer(true); //important
$mail->CharSet = 'UTF-8';  //not important
$mail->isSMTP(); //important
$mail->Host = 'smtp.office365.com'; //important
$mail->Port       = 587; //important
$mail->SMTPSecure = 'tls'; //important
$mail->SMTPAuth   = true; //important, your IP get banned if not using this

//Auth
$mail->Username = '[email protected]';
$mail->Password = 'your APP password';//Steps mentioned in last are to create App password

//Set who the message is to be sent from, you need permission to that email as 'send as'
$mail->SetFrom('[email protected]', 'Hosting Group Inc.'); //you need "send to" permission on that account, if dont use [email protected]

//Set an alternative reply-to address
$mail->addReplyTo('[email protected]', 'First Last');

//Set who the message is to be sent to
$mail->addAddress('[email protected]', 'SIMON MÜLLER');
//Set the subject line
$mail->Subject = 'PHPMailer SMTP test';
//Read an HTML message body from an external file, convert referenced images to embedded,
//convert HTML into a basic plain-text alternative body
$mail->msgHTML(file_get_contents('replace-with-file.html'), __DIR__);  //you can also use $mail->Body = "</p>This is a <b>body</b> message in html</p>" 
//Replace the plain text body with one created manually
$m