Log in as the network administrator from Web Image Monitor.
Point to [Device Management], and then click [Configuration].
Click [S/MIME] under "Security".
Select the encryption algorithm from the drop-down menu next to "Encryption Algorithm" under "Encryption".
Click [OK].
The algorithm for S/MIME is set.
Log out.
Configure the settings taking into consideration the encryption algorithm and digest algorithm supported by the user's e-mail software.