Connect Office 365 use POP3 - PHP - php

Question

I have a trouble with Office 365 use POP3 method.
Currenty, I can't connect to this server:
outlook.office365.com
port：995
This is my code example:
<?php
$host = 'outlook.office365.com';
$port = '995';
$username = 'outlook_mail';
$password ='password';
$mbox = imap_open('{'.$host.':'.$port.'/pop3/ssl/novalidate-cert}', $username, $password);
echo "<h1>Mailboxes</h1>\n";
$folders = imap_listmailbox($mbox, "{".$host.":".$port ."}", "*");
if ($folders == false) {
echo "Call failed<br />\n";
} else {
foreach ($folders as $val) {
echo $val . "<br />\n";
}
}
echo "<h1>Headers in INBOX</h1>\n";
$headers = imap_headers($mbox);
if ($headers == false) {
echo "Call failed<br />\n";
} else {
foreach ($headers as $val) {
echo $val . "<br />\n";
}
}
imap_close($mbox);
If I change port to 993, it's OK.
Anyone know this problem? Many thanks!

Answer 1

I think it's because pop3 is on port 993 and imap is on port 995.
Have you tried with imap in your host config instead of pop3 when using port 995 ?
$mbox = imap_open('{'.$host.':'.$port.'/imap/ssl/novalidate-cert}', $username, $password);
Source : https://www.php.net/manual/en/function.imap-open.php (flag section)