HTC 3125 Manuel D’Utilisation

48  Synchronizing Information and Setting Up E-mail Security

Windows Mobile on your phone protects your Outlook emails through 

Secure/Multipurpose Internet Mail Extension (S/MIME), which allows 

you to digitally sign your messages as well as encrypt them.
Using authorization keys and certificates, S/MIME allows you to 

digitally sign your email messages to prove your identity to the 

recipients. Authorization keys are also used when encrypting 

messages to improve privacy and prevent undue tampering or hacking 

of your messages. You can encrypt a message with or without a 

certificate. However, to read an encrypted message, you need a valid 

certificate for decrypting email messages.

Note 

S/MIME encryption and digital signatures for Windows Mobile-based 

devices are available only with Exchange Server 2003 Service Pack 2 

or a later version that supports S/MIME. If you aren’t using one of these 

products or have not yet synchronized, these options are unavailable.

ActiveSync allows you to set up S/MIME email encryption and signing. 

You will have to obtain a valid certificate for signing or encrypting email 

before you will be able to sign or encrypt mail successfully.

On the Home screen, click 

Start > ActiveSync.

Click 

Menu > Options.

Select the 

E-mail information type and click Settings. On the 

E-mail Sync screen, click 

Menu > Advanced.