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52 | Synchronizing Information and Setting Up E-mail Security
Digitally sign and encrypt all messages
ActiveSync allows you to set up S/MIME e-mail encryption and signing. You will have to
obtain a valid certificate for signing or encrypting e-mail before you will be able to sign or
encrypt mail successfully.
1. Tap Start > Programs > ActiveSync.
2. Tap Menu > Options.
3. Select the E-mail information type, and tap Settings. On the E-mail Sync Options
screen, tap Advanced.
4. Do one or both of the following:
• To sign all your outgoing e-mail messages so that
recipients can be certain that the messages were sent
by you and have not been altered in any way, select the
Sign all outgoing e-mail messages check box.
• To encrypt all your outgoing e-mail messages so that
the contents of your messages are protected from being
viewed by anyone other then the intended recipients,
select the Encrypt all outgoing e-mail messages
check box.
5. Tap Choose Certificate to select a certificate for signing or encrypting outgoing e-mail
messages. You can select certificates to sign or encrypt e-mail messages individually if
you do not choose to sign or encrypt all outgoing e-mail. For information about signing
and encrypting individual messages, see “Individually sign and encrypt a message” in
Chapter 7.