To decrypt messages received on another email client and to sign outgoing messages, you have to copy your private keys to the other client. To do so, you can use the Autocrypt transfer service. The Autocrypt transfer service sends you an email with your private keys. This email is encrypted with a 36 digit code.
How to transfer your Autocrypt keys to another client:
Click theicon in the menu bar. Click on .
The Settings window opens.
Click on .in the left pane. Click on
Enable. Items for managing keys and for the Autocrypt settings will be displayed.
Click on Autocrypt Transfer Keys window opens.below . The
Enter your Guard password. Click on.
A setup email with a passcode will be sent to your primary email address. The passcode will be displayed in the Autocrypt Transfer Keys window.
Open the setup email on the wanted email client. Enter the passcode.
Parent topic: Encrypting Email Conversations with Autocrypt