doubt about email method used by notifications

Hello,
i'm in a doubt, i hope you can help me with it.
In System -> Main Config -> Mail, we have this:

Use SMTP to send system mails
SMTP host
SMTP port
SMTP user
SMTP password
Use SSL/TLS encrypted connection for SMTP​

Also in System -> Server Config -> "our server" -> Mail, we have this:

Relayhost
Relayhost user
Relahyhost Password​

Actually i've filled both sections but the quota notifications emails are sended using the mail function. I've examined
the email notification's headers received and i can see this line:

X-PHP-Originating-Script: 0:monitor_tools.inc.php​

Near the end of that file, there is a call for a mail function, i suppose it's used for send the emails:

public function send_notification_email($template, $placeholders, $recipients) {
...
for($r = 0; $r < count($recipients); $r++) {
mail($recipients[$r], $mailSubject, $mailBody, $mailHeaders);
}
...​

So, is it possible monitor_tools.inc.php script doesn't uses SMTP o Relay settings for send its emails ?
Thanks a lot,
Regards,

 

https://git.ispconfig.org/ispconfig/ispconfig3/issues/4500

 

Thanks Florian,
Regards,