You need a paid subscription to IncaMail to be able to use it in eTermin.
You can decide if the encrypted e-mails should only be sent to you or if they should get sent to the person booking the appointment as well by going to Company > Settings > Communication.
You can activate the mail encryption option by IncaMail by going to Company > Settings > E-Mail Clipher.
As an alternative to IncaMail you can use the PDF encryption. All the information about the person booking the appointment will be sent to you as an encrypted PDF file by e-mail.
Notice: The person booking the appointment will receive an unencrypted confirmation e-mail.
Activate this setting by going to Company > Settings > Communication.
After activating this option you can define a PDF file password.