Here you determine if and how the device encrypts the connection. The available values have the following meaning:
- No: No encryption. The device ignores any STARTTLS responses from the server.
- Yes: The device uses SMTPS, i.e. encryption is active from the connection establishment.
- Preferred: The connection establishment is not encrypted. If the SMTP server offers STARTTLS, the device will use encryption. This is the default setting.
- Required: The connection establishment is not encrypted. If the SMTP server does not offer STARTTLS, the device transmits no data.
- Telnet path:
- Possible values:
- No
- Yes
- Preferred
- Required
- Default:
- Preferred