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How to send and receive signed encrypted mail with the mail software that comes with MAC computer?
Methods/steps

1. Install the client mail certificate;

A. Mail customers who have configured the MAC first can send and receive mail normally;

B. After applying for Wotong's certificate, double-click to open the pfx file.

C. After double-clicking to open, prompt for password;

D after successful installation, the following digital certificate information will appear in the keychain access of the MAC;

2. Use the mail client to send signed and encrypted mail;

A. open the mail client of MAC and create a new mail;

B. Enter the e-mail address and subject of the recipient, and the encryption and signature buttons will appear at the back end of the e-mail.

3. Receive signed and encrypted emails;

Matters needing attention

Apply for digital certificate in advance