The following options exist:
Sending an encrypted email. Only you and the recipients can read the email content.
Sending an email with a signature. The signature ensures that the recipient is able to recognize whether the email content has been changed on the transport.
Sending an encrypted email with a signature.
As default, Guard uses PGP encryption. Depending on the configuration, you can also use S/MIME. To do so, you have to use S/MIME encryption prior to the initial usage.
How to enable S/MIME encryption:
Click theicon in the menu bar. Click on .
You can also click onin the App Launcher.
The Settings window opens.
Click on in the left pane.
If S/MIME encryption should be set as default, enablebelow .
How to send an encrypted email:
If S/MIME encryption is enabled, you can choose between S/MIME and PGP. To do so, click theicon in the button bar of the email edit window.
Below, select or .
Click theicon in the button bar.
If you are not signed in to Guard, the window for entering the Guard security password opens. Enter the password.
A function bar will be displayed above the email text. A text will be displayed within the function bar notifying you about the encryption of the email.
Icons next to the recipients indicate whether the message can be encrypted for this recipient. If hovering over an icon, a description will be displayed.
In order to show further options, click onin the function bar.
In order to additionally sign the email, enable.
To enable The email recipient to send an encrypted reply, the recipient needs to have your public key. You can send your public key as attachment. To do so, enable.
When using PGP, the following option applies:
If Guard settings, you can set the PGP format.is enabled in the
By default, encrypted emails are sent informat. Some older email clients only support PGP/Inline. If the recipient uses such a client, enable .
Note: If you use, you can not send emails in html format.
You can also use themenu in the button bar to sign the email or to send your public key as attachment.
When sending to new recipients, a window is displayed that allows to send notes for opening the encrypted email to the recipients.
Parent topic: Encrypting Email Conversations