Encrypting emails with digital certificates can effectively prevent others from reading emails in the process of sending them.

To encrypt a message, click the Encrypt menu item on the Tools menu in the message writing window, or click the Encrypt button in the toolbar. Toolbox

To send an encrypted email, you need to encrypt the email with the recipient's public key. Generally speaking, there are two ways to get a message and encrypt it with the recipient's public key:

First, reply the email directly with digital signature and encrypt the email. The recipient of the reply email automatically contains his certificate information (public key). Double-click the recipient in the "Recipient" column of the mail composition window to open the address book card properties dialog box, and you can view the certificate information of the recipient in the "Digital Certificate" tab.

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Second, send encrypted mail to the card containing the digital certificate. To add a digital certificate with public key information to an address book card, see Adding a Digital Certificate.