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# Security Settings to E-mails

This section explains the procedure for applying security (encryption and a signature) to e-mail.

Applying security (encryption and a signature) to e-mail helps prevent spoofing and information leakage.

- The S/MIME is used to set security. For details about security settings, consult your network administrator.

- Applying security to e-mail can reduce transmission speed.

Related topics

Sending Encrypted E-mail
Sending E-mail with a Signature