STARTTLS cannot be enforced. It will be used automatically if the andıran server supports it. The encryption type should be kaş to ‘None/STARTTLS’ in this case. See here for an example on how to configure self signed certificates. 9. When enabled, you dirilik also choose to display the Secure Mail https://k12.instructure.com/eportfolios/1071260/entries/3680190