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How does qq send encrypted mail?
To send a digitally signed and encrypted e-mail, just select the Digital Signature and Encryption menu item in the Tools menu or the Signature and Encryption button in the toolbar when writing an e-mail. Mail can be digitally signed and encrypted at the same time, or only digitally signed or encrypted.

To send a digitally signed and encrypted e-mail, just select the Digital Signature and Encryption menu item in the Tools menu or the Signature and Encryption button in the toolbar when writing an e-mail. Mail can be digitally signed and encrypted at the same time, or only digitally signed or encrypted.

To send e-mail with digital signature, you need to apply for and install a digital certificate in the system; To send an encrypted message, you must obtain the public key of the recipient's digital certificate.