Microsoft Office Tutorials and References
In Depth Information
To digitally sign all outgoing messages:
On the E-mail Security page of the Trust Center dialog box, in the Encrypted
e-mail area, select the Add digital signature to outgoing messages check box.
If your message recipients might not have S/MIME (Secure Multipurpose Internet Mail
Extensions) security (for instance, if you’re sending messages to people who you know
aren’t using Outlook), ensure that the Send clear text signed message when sending
signed messages check box is selected (this is the default setting). Then click OK in all
the open dialog boxes.
You can secure the contents of outgoing messages by using encryption, which ensures that
only the intended recipients can read the messages you send. A message recipient’s email
program must have corresponding decryption capabilities in order to read the message.
You can encrypt individual messages when you compose them, or you can instruct Outlook
to encrypt all outgoing messages.
To encrypt an individual message:
On the Options tab, in the Permission group, click the Encrypt button.
To encrypt all outgoing messages:
Display the Email Security page of the Trust Center dialog box.
In the Encrypted email area of the Email Security page, select the Encrypt contents
and attachments for outgoing messages check box.
To receive verification that a message recipient received an encrypted message in
its encrypted format, select the Request S/MIME receipt for all S/MIME signed
messages check box.
An encrypted message has a blue lock on its message icon and an encryption icon (also a
blue lock) in its message header. When you receive an encrypted message, you can click
the encryption icon to view the message security settings.
TIP If you try to send an encrypted message from Outlook to a recipient whose email
configuration doesn’t support encryption, Outlook notifies you and gives you the option of
resending the message in an unencrypted format.
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