You can also send encrypted E-Mails to external recipients who are no groupware users. When adding an external recipient, Guard checks whether a public key is available for this E-Mail address. Depending on the result, Guard uses different procedures for sending the encrypted E-Mail:
If there is a public key for the recipient:
The message is sent encrypted with this key. The recipient can read the message with his/her private key.
If there is no public key for the recipient:
If the external user already has a guest account, he/she receives an E-Mail with the link to the login page of his/her guest account. When having logged in, he/she can read the encrypted E-Mail on the guest page. He/she can send an encrypted reply from this page.
If there is no guest account, a guest account will be created. The external recipient receives an E-Mail with a link to a guest page and an automatically created password. The user logs in to the guest page. Then he/she can create an own password.
Depending on the configuration, the automatically created password and the link to the guest page are sent in separate E-Mails.
Depending on the configuration, the first E-Mail to the external recipient can be protected with a four-digit pin.
Depending on the configuration, guest account E-Mails are deleted from the server after a specific number of days.
The external recipient can send an encrypted reply to the encrypted E-Mail. It is not possible to add additional recipients though.
Parent topic: Encrypting E-Mail Conversations