STARTTLS Cannot be enforced. It will be used automatically if the mail server supports it. The encryption type should be takım to ‘None/STARTTLS’ in this case. See here for an example on how to configure self signed certificates. En cochant cette case, vous confirmez que vous avez lu et que https://www.metooo.co.uk/u/687456dfe0820c23ef54c8a7