Kirby SMTP without tls/ssl

So a client gave me SMTP credentials that require disabling the use of tls/ssl. This I found was impossible using Kirby PHPMailer.

If I set ‘security’ to anything other than ‘ssl’, it will always be tls…

At the end I had to change the core file using an older thread from this forum:

Have you tried to set it to 'security': false?

Yes, when I say ‘anything’ I mean anything else. Including false, ‘’, null etc